Joan's Blog

November 10, 2009:

One week until our next broadcast D4K!  We will be taking your questions about chemistry.  This is the first time that we’ve talked about chemistry on D4K.  Our guests are planning some surprises, so be sure to tune in either on Idaho Public Television at 2:00/1:00 p.m. Mt/Pac or watch it here live.  You can also watch the archive version here later that day. Send in your questions now.

Chemists are making science news this week.  Researchers at the University of Missouri have discovered ways to make ice cream healthier.  They are adding nutrients like fiber and pro-biotics.  It is tricky because you don’t want to change the creamy goodness of ice cream.  Chemists there have found that flavors like chocolate are easier to work with because they are strong and can cover up some of the taste of the additives.  What the scientists don’t know is if people will pay more for ice cream with added nutritional benefits or if they will be mad about science messing with their comfort food. What do you think?

We will be talking about nutrition in our January show, but there are great facts and links already available on the nutrition site. If you are curious, check it out.

I’m looking forward to seeing your questions and learning more.

November 02, 2009:

Today is El Dia de los Muertos or All Souls’ Day or the Day of the Dead.    I remember my Dad, Fred Cartan, who was a scientist, on this day. 

My Dad would have appreciated these pictures.  Matt Kohn, Associate Professor of Geology at BSU and one of the guests on our recent Geology show gave these pictures to me. These pictures are examples of the forces nature uses to shape rocks.  They are pretty cool.

We have a new site on the D4K web page.  Be sure to check out the new “Games” page. This is our first jump into educational games, so try some and let me know what you think.  We plan to redesign the page next season based, in part, on your feedback.

As for science news this week, here is one interesting study noted in EurekAlert.   I present it  in honor of the World Series.  Zhong-Lin Lu, a professor of cognitive neuroscience at the University of Southern California, USC alumni Emily Knight and Robert Ennis and Arthur Shapiro, associate professor of psychology at American University answered the question of whose curveball breaks harder—that of the Yankees’ AJ Burnett or the Phillies’ Cole Hamels.  It turns out that the answer is neither one.

The scientists developed a simple visual demonstration that suggests a curveball’s break may be just a trick of the eye.  It seems that the batter thinks there is a break in the ball’s path when he is forced to switch between his peripheral vision and his central vision during a swing.  Their demonstration won the Best Visual Illusion of the Year prize earlier this year.  You can see it for your self here: http://illusioncontest.neuralcorrelate.com/2009/the-break-of-the-curveball/

Our next broadcast show is coming up on November 17^th.  Send in your questions about chemistry.

October 26, 2009:

Boo! Did I scare you? Probably not, but many people seem to be scared by something. If you are so scared by something that it becomes a problem in your life, your fear is called a phobia. So in honor of Halloween, here is a list of the top 10 things that really scare people, according to the folks at LiveScience.

10.  The dentist (I like my dentist, Dr. Bruce. You can see him in the
       video short, All about Teeth)
9.    Dogs
8.    Fear of flying in an airplane
7.    Thunder and lightening.  (Okay, I can go along with this one!)
6.    The dark
5.    Heights
4.    Speaking in front of other people
3.    Confining spaces
2.    Spiders
and the number one thing that scares people . . . Snakes!

How does this list compare to what scares you?

My favorite scientific study this week isn’t scary at all.  It deals with being clean.  It turns out the cleanliness fosters morality.  So, what does that mean?  Well, researchers set up a game.  Players were given $12, which they were told came from someone they didn’t know in another room.  That player had to decide how much money to keep and how much to return to the other person.  That second person trusted the first player to divide it fairly.

The researchers sprayed one room with a common window cleaner and left another room unscented.  The players who were in the room with the cleaner gave back on average $5.33 to their unknown partners.  The players in the unscented room gave back on average only $2.81.  None of the players said they noticed any scent.  So why did the players in the clean room give back more? 

Researchers know that smells can play a role in whether an experience is a good or bad one. Now they think that a clean smell might inspire you to do the right thing. So, clean your room and you might get a nice reaction from your Mom. If you want to read more about it, here is the link to the article in LiveScience.

If you haven’t seen it yet, check out last week’s new broadcast show on bird migration. Be sure to send in your question for our November show. We will be talking about Chemistry. More about that next week!

October 13, 2009:

Happy day after Columbus Day!  Sorry the blog was delayed, but I took the day off and did some exploring on my own.  I’m not the only one still exploring.  NASA is looking for water on the moon. This past week, they fired a rocket into the face of the moon, hoping to find traces of water in the dust and debris that the explosion would throw up into the air.  If you want to watch the impact, check out the NASA TV coverage. Did they find any water?  The short answer is they don’t think so, but it will really take a couple of weeks before they can confirm exactly what they did find.  I will report when I hear.

One other bit of news caught my eye. Scientists from Oxford University in England report that juggling increases brain power.  It turns out that learning a complex task, like juggling three balls in the air, can increase the white matter in your brain by 5%.

Your brain has white matter and gray matter.  Gray matter is made up of nerve cell bodies.  White matter is made up of long, thin, string-like filaments that carry electrical signals in the brain. They are called gray matter and white matter because that’s what they actually look like. 

Scientists have known that we can increase gray matter in our brain by learning, but this is the first time they have proved you can also increase your white matter.  That is important because it could lead to better treatments for diseases like multiple sclerosis.

In this study, 24 people were given brain scans and then divided into two groups. One group spent six weeks learning to juggle.  The other didn’t.  At the end of the experiment, everyone had another brain scan.  Scientists found a 5% increase in the brains of the jugglers in the part of the brain that we use to reach for objects in our peripheral or side vision.  It didn’t seem to matter how well the volunteers learned to juggle, as long as they trained.  Scientists think that juggling isn’t the only way to grow white matter.  They believe you can probably increase your brain power by learning any complex task.  Cool. Here’s a link to the BBC article if you want more information.

We are getting ready for next week’s broadcast show.  We will be taking your questions about bird migration. Watch the show and meet my new friend.  Be sure to also send in your questions.

October 05, 2009:

How many times do you have to shuffle a deck of cards to make sure that deck is really shuffled?  It turns out it took mathematics and magic to learn the answer.

Persi Diaconis was interested in answering this question.  When he was 14, he started life as a professional magician doing card tricks.  Eventually, he realized to answer his questions, he would have to study math and he became a mathematician at Stanford University.  Much of his research is about shuffling cards and probability, the study of chance.

So after years of studying and with the help of some major computers, Diaconis and his friend Dave Bayer of Columbia University came up with the answer:  seven.  Say you pick a card, the three of hearts, and put it back on top of the deck. After the first shuffle, the computer could identify patterns in the cards and find your three of hearts out of order.  Bayer describes it this way.  “Shuffling cards is like mixing a marble pound cake. For a while, there are clear streaks of black and white. Then, all of a sudden, it turns brown.”  For cards, it would take seven shuffles before the patterns get so mixed up that a computer would have trouble identifying your specific card.  If you are playing Old Maid, where the suits of cards (the hearts, diamonds, clubs and spades) don’t matter, you only have to shuffle it four times.

So if you are playing cards this week, shuffle seven time for a really well mixed up deck.

I’m working on our next broadcast show.  On October 20th, we will be taking your questions about bird migration.  If you are wondering what to ask, check out the Bird Migration web site and send in an email.

September 28, 2009:

The World Wildlife Fund reported the identification of a whole bunch of new species. Scientists found 100 new plants, 28 new types of fish, 18 new reptiles, 14 new amphibians, 2 new mammals and a new bird. How about that? All of the species were found within the Greater Mekong region of Southeast Asia. That area includes Cambodia, Laos, Myanmar, Thailand, Vietnam and the southwestern Chinese province of Yunnan. My favorite is the Khorat big-mouthed frog. The frog has fangs that stick out from its bottom jawbone. It waits for its prey in streams, eating other frogs and insects. It has been found in three remote locations in Thailand.

The WWF report also says all of these species and many more are in danger from climate change. Rising seas may push more saltwater into the area threatening all of these species. Climate change threatens moose in Minnesota and even species here in Idaho. Ask the scientists about how climate change affects birds on our next live broadcast show. Send in a question today!

Scientists in San Diego this week released another interesting report not about frogs but about spanking. University of New Hampshire professor Murray Straus reports that being spanked as a child that child’s IQ. The IQ is a test of intelligence. Straus says children in the United States who were spanked had lower IQs than those who were not spanked, lowered by as much as five points. That is a big difference. Straus says the same is true of children all over the world. “The more spanking, the greater the slower the development of a child’s mental development,” according to the Professor. He and his study team think that children who are spanked are under stress and it is hard to learn when you are stressed out. What do you think? You can read more about the study from and ABC report.

Have a good week!

September 21, 2009:

Happy first day of Fall. This year, the autumnal equinox hits on September 22nd at 3:18 p.m. MT. We will have 12 hours of daylight and dark and the days will be getting shorter until December 21st, the shortest day of the year.

The biggest science news this week came out of China. Scientists there found a small dinosaur fossil that looks like a miniature T-Rex. This three feet tall dinosaur called Raptorex kriegsteini came along about 35 million years earlier than the T-Rex, but it looks just like its bigger cousin.

Paleontologists, scientists who study dinosaurs, used to think T-Rex’s features, like its puny arms, evolved because of its huge size. But this smaller version has the same build, just in much smaller proportions. The Raptorex was about nine feet long and weighed about 150 pounds. T-Rex’s grew 90 times that size.

Dr. Paul Sereno, a scientist with the University who studied the new fossil, thinks that the Raptorex’s and T-Rex’s small arms are a trade off for the creatures’ big heads. The bigger the head got, the smaller the arms got so the dinosaur would be able to maintain its balance. To learn more, click on this article from the American Association for the Advancement of Science and thanks to Todd Marshall for the drawings.

We also had our first broadcast show of the 2009-2010 school year. If you haven’t had a chance to see our Geology show, video short or Web only show, click here and check them out.

September 8, 2009:

So, have you ever been told you had an athlete’s body? Some argue that they can tell what kind of sport you should play just by the look of your body. Sprinters, those athletes that run fast, short races are usually smaller. Smaller runners would use less energy because they have less body mass to pull along.

But then how do you explain Olympic winner Usain Bolt? He recently set the world’s record in the 100 and 200-meter race and Bolt is six-feet-five inches tall!

Scientists went to work trying to figure out how such a tall guy can run so fast. And they think it may have something to do with the way he flexes toward his shin when he runs. According to an article in the LA Times, Corey Hart, an exercise physiologist with the Physio Performance Lab in Boise suggests that Bolt doesn’t put his heel too close to the ground when he runs. That’s called dorsiflexion. Sprinters, he says, run on their forefeet. But another scientist, Dan Cipriani, from San Diego State University thinks the key to Bolt’s speed is due to the movement of his shins away from his feet or the opposite of dorsiflexion. That happens when Bolt takes off.

Whatever it is, be it how he flexes his foot or something in his genes, Bolt proves that old saying: you can judge a book by its cover. Don’t let someone limit you to one sport just because “you’re built for it.”

This week we celebrate a mathematical miracle. Wednesday is 09/09/09. This is the last time for more than a century that we will see a triple single digit day. Dates like this play an important role in some cultures. In China, 09/09/09 is big. The number 9 is a positive thing. According to legend, the Emperor’s Forbidden Palace has 9,999 rooms. But in Japan, the number 9 is associated with bad things. Many Japanese hotels do not even have a room number with a 9 in it. Me? I associate 9/9/9 with something wonderful. September 9th is my Mom’s birthday. Happy Birthday Mom!

One more date to note-September 15th. That’s the premier of this season’s broadcast shows for D4K. Send in your questions now (link) for our Geology show and check out the program live on Idaho Public Television at 2:00/1:00 p.m. Mt/Pac or watch it here on the Web site live or anytime afterwards. Remember, when you send in a question, you and your class will have a chance to win DVDs and other prizes.

August 31, 2009:

I am not a big fan of snakes. I realize they have their place in the ecosystem, but they are just not my thing. And maybe, science explains why. Girls apparently learn to dislike snakes before their first birthday.

According to “Science News,” researchers have discovered that infant girls but not infant boys learn to link the sight of a snake or spider to the frightened reaction of others by about 11 months of age. Bites from poisonous snakes were a real danger to prehistoric women, so researchers think that we may have inherited this discomfort with snakes. Another scientist thinks girls learn how to read other people’s facial expression before boys. If that is the case, girls would link a dislike of snakes sooner than boys would by reading their parents’ faces.

How about you? Do you like snakes?

Oh, sorry for not posting a note last week. We have been shooting video for the upcoming season. Here are a few pictures of what we have been up to…

Start the count down for the new season of D4K. Our first broadcast show of the season is September 15th!

August 17, 2009:

Why do flamingoes stand on one leg? Researchers Matthew Anderson and Sarah Williams from Saint Joseph’s University in Philadelphia have finally come up with an answer to that question and it wasn’t the answer many scientists thought it would be.

Researchers originally thought flamingoes stand on one leg because it helps them use less energy when they take off to fly or because it helps them balance better in the wind. But both theories turned out to be wrong. Instead, they found that flamingoes stand on one leg to help regulate their body temperature. Flamingoes stand in water for long periods of time and they lose less body heat with just one foot down. Simply, keeping one foot up keeps them warmer.

Also, it seems like flamingoes don’t prefer standing on one foot over another. Apparently, flamingoes are not right or left-footed. They will just change which leg they stand on to keep the other leg from getting too cold.

Now that is important. Not preferring one leg over the other was an important discovery for Anderson and Williams. That’s because these researchers were also trying to find out if flamingoes favor one side of their body over the other, in the same way we humans are left-handed or right-handed.

While flamingoes are not right or left-footed, they apparently do favor right side sleeping. When flamingoes rest, they curl up. Some placed their heads on the right side of their body and some on their left side. Anderson and Williams watched captive Caribbean flamingoes at the Philadelphia Zoo and learned that most flamingoes prefer to sleep with their heads to the right. They also found that those flamingoes that sleep with their heads to the left seem to get into trouble with the other flamingoes more often. Anderson and Williams think that being right-side sleepers may be a way flamingoes form social groups. Look for a flamingo sleeping to the left and you may have found a rebel or a bully. Do you think being left or right-handed makes a difference in who your friends are? Now that would be an interesting research question!

August 10, 2009:

I have reported in previous entries that dogs don’t feel guilt… at least they don’t even though we humans think they do.  While they might not feel guilt, dogs do have emotions and they may be as smart as your toddler brother or sister.

As reported in LiveScience.com, the average dog is as smart as the average 2-year-old.  Stanley Coren, a dog expert and professor emeritus at the University of British Columbia tested a number of dogs.  He found that the average dog can learn 165 words, about what a 2-year-old knows.  He says the really smart dogs can learn 250 words.

Coren says dogs are better than some 3 and 4-year olds at basic arithmetic and have spatial problem-solving skills (that is dogs are good at figuring out how to open that latch and get at a good treat).  And while dogs might not feel guilt, they do show the basic emotions of happiness, anger and disgust.  Yes, your dog might not like it when you do something you shouldn’t.

And just what are the smartest breeds?  Here’s this list:

1. Border collies
2. Poodles
3. German shepherds
4. Golden retrievers
5. Dobermans
6. Shetland sheepdogs
7. Labrador retrievers

And who is at the bottom?  Many of the hounds, like the basset hound and the bulldog, beagle and basenji.  Why?  Well Coren says the dogs on the bottom are older breeds.  They were trained to find things (such as tonight’s dinner).  These dogs may have more instinctive intelligence, that is the ability to do what they were bred to do rather than play with us humans. Coren says the smartest dogs have been bred to respond to humans. So that would give them an advantage in a test to respond to human signals.

That is not to say the dogs on the bottom of the list aren’t great dogs.  Beagles were on the list of top 10 most popular dogs in 2008. Coren thinks that’s because they are sweet and sociable.

What do you think?  How smart is your dog?  Smarter than my rabbit?  Not more cute.  Here’s Winslo’s latest picture.  Have a great week.

August 3, 2009:

Did you get outside this weekend?  Spend some time in the sun?  No?  Well, you may not be getting enough vitamin D.  Researchers report that about 70 percent of U.S. children have low levels of vitamin D.  If you don’t have enough vitamin D, you are at risk of bone and heart disease, especially later in life.

So, how do you get enough vitamin D?  You can drink milk fortified with vitamin D and eat foods rich in vitamin D.  The American Academy of Pediatrics suggests a vitamin D supplement.  But perhaps the best thing you can do is get outside!  Our bodies make vitamin D when exposed to sunshine.  You should be outside 15 to 20 minutes a day.  Now, I sunburn easily, so I suggest using sunscreen if you are going to be outside more than that…but it is important to get outside.

Also, drink water if you are going to be out in the heat!

One other scientific study of note starting today... British psychologist Richard Wiseman is inviting people in England to participate in a five-day study to improve their happiness level.  He is hoping thousands of people will help.  Participants will be randomly assigned to one of four groups.  People in each group will rate their mood and then watch a video describing one of four ways to boost happiness and use that technique for the week.  They start today and will finish by Friday.  By the end of the week, the participants will rate the mood again and see if the happiness suggestion worked.  Researchers hope to figure out which of the various happiness suggestions work best.

Here are some suggestions for things to do to make you happier…

1. Meet up with friends you haven’t seen for awhile
2. Watch a funny television show or film
3. Exercise 30 minutes, three times a week
4. Cut your television watching by half
5. Buy experiences, not goods.  Go to a concert, moving, museum or new restaurant
6. Create novel challenges, Start a new hobby, join a new organization, learn a new skill.
7. Go for a 20-minute walk in the sun (helps with vitamin D!)
8. Spend 10 minutes listening to relaxing music
9. Pet a dog (or in my case, a rabbit)
10. Stop watching or reading the news.

Which activities do you think will make people happier?  Professor Wiseman says he will release the results of his experiment next week and I will try to report the results here. In the meantime, I am going home to pet Winslo!

July 27, 2009:

So, have you found a way to beat this summer’s heat? If not, ask a toucan. Scientists reported this week that toucans use their beaks to help regulate their body heat.

Researchers have long wondered why toucans have such big bills. After all, the beak makes up about a third of the bird’s entire body length. Some thought the bill might be used to attract mates or used in defense. But Glenn Tattersall of Brock University in Ontario, Canada and his team had a different idea.

They found that a toucan’s beak contains lots of blood vessels. Using a special type of photography that detects heat, called infrared thermal imaging, Tattersall found that toucans use the blood veins in their bills to help get rid of extra heat when it is hot and keep heat in when it is cold. Birds, by the way, don’t sweat so they would need something to help them regulate their body temperature.

Scientists say that toucans may still use their bills for other reasons too, like showing off for females, but they think that having your own radiator/beak to keep you the right temperature is pretty, well, cool.

July 20, 2009:

Today is an important anniversary for space travel. 40 years ago, the first humans stepped on the Moon. Be sure to check out the Web site WeChooseThe Moon.org. There you can listen to a real time re-creation of the Apollo 11 mission with great animation. I have the widget on my desktop to remind me to check the site at key moments.

The science blogs were all a flutter about news that moths use sonar to escape bats, but I liked the story finding cats do control humans. Anyone who owns a cat already knows this, but it is nice science confirms it.

It turns out that cats learn that if they make a purring sound combined with a high-pitched meow when they are hungry, their owners will feed them. Cats have learned that general meowing doesn’t get as good a response from human. So they are more likely to use this special purr-cry to get you to do something.

Why not just a regular meow? It turns out the sound of a cat crying is similar to the sound of a baby crying. Humans have an instinct to answer a baby’s cry. So we are programmed to answer a cat’s cry too. But humans are also likely to toss a meowing cat out the door if its cry is too annoying. So cats have learned that this special cry-purr is better for getting what they want.

So just how did scientists test this theory? They had cat owners record the sounds their cats made when the cats wanted food and when the cats didn’t. The researchers then played the cries to 50 subjects, not all of whom owned cats. The humans rated that special purr-cry as more urgent than a regular purr. That means the special cat purr-cry would be more likely to make you get out of your chair and find your cat its favorite treat.

So, if you are feeling at bit used at the moment, consider one other fact. Only cats that have a one-on-one relationship with their owners make this sound. They have to know you and like you, to manipulate you.

July 14, 2009:

It has been 40 years since Apollo 11 made its historic journey to the moon. I wasn’t very old at the time, but I do remember the excitement of watching Neil Armstrong set foot on the moon, the first human to do so. It was cool! Back then, we followed the whole journey on television. Now, you have the chance to follow that journey in real time, just like it happened 40 years ago, on your computer.

 

Starting Thursday, July 16th at 9:32 a.m. (Eastern time), the Web site, WeChoseTheMoon.org will recreate the entire mission. They will replay the video and audio building up to the landing on the moon on July 20th. They will have special animation and lots of fun information about the Apollo 11 mission. You can follow the astronauts as they head to the moon on the Web site or on a special Twitter feed. There is even a cool widget for your Facebook or desktop to help you keep track of the mission. The John F Kennedy Library and Museum sponsors the site. President Kennedy was the first to challenge us to reach for the moon. So take some time this summer and reach for the moon yourself. If you want to learn more about the moon, check out the Moon section here on the D4K site.

July 7, 2009:

Happy Belated 4th of July! Hope you had a great holiday. Be sure to check out the fireworks section of this D4K site to learn more about the science behind making fireworks.

My favorite science news this week comes out of Australia. Paleontologists there have discovered three new dinosaur species. I love their nicknames too. They were named after characters in Australia’s famous song, “Waltzing Matilda.” The first is carnivore, a meat eater, named Australovenator wintonensis. Its nickname is Banjo, named after Banjo Patterson who wrote “Waltzing Matilda” in Winton in 1885. Banjo, not the songwriter, was a scary dinosaur. He could run fast and had three sharp claws on each foot.

The next two are plant-eating sauropods and were among the largest animals to ever walk on Earth. Witonotitan watts, better known as Clancy, was a tall slender animal. Diamantinasaurus matildae or Matilda was shorter and more rounded.

Matilda and Banjo were found in a 98-million-year-old pond known as a billabong. Scientists think Matilda might have been Banjo’s last lunch.

If you want to learn more about dinosaurs, there is lots of information on this D4K site.

FYI, the American Association for the Advancement of Science put out a list of new science books for summer reading. Here is the link: http://www.eurekalert.org/features/kids/2009-06/aaft-a1s062909.php. Head to your local library and find something fun to read.

June 26, 2009:

So, what do pigeons think about? A New York Times article reports that scientists are working on answering that question. Scientists think that homing pigeons use landmarks, the earth’s magnetic fields and the position of the sun to find their way home, but they really don’t know exactly how homing pigeons find their way. They wondered if pigeons think about their route, or do they travel just by instinct, without much thought.

The scientists implanted very tiny electric EKGs into the brains of homing pigeons. An EKG is a machine that can track brain waves. Scientists think that when the EKG machine shows mid-range frequencies, the brain is thinking about something it sees. When the brain shows high-frequencies, scientists believe the brain is really thinking about something complicated. That is called cognitive activity. The scientists also put little global positioning systems on the pigeons so they could match the brain activity to right spot.

So then, the scientists let these special pigeons fly starting over water, which has few landmarks. Not much brain activity. But when the birds flew over land, landmarks they would recognize, their brains started registering those mid-range and high-frequency brain waves. So it seems that pigeons can recognize landmarks and understand what they see.

One other thing surprised the scientists. Their EKG readings showed the pigeons had an increase in brain waves at two places the scientists hadn’t expected. They went back to those spots and found a couple of wild pigeon colonies. It seems pigeons think about more than just landmarks.

Have a great week and a happy 4th of July!

June 22, 2009:

Are boys better than girls at math? The former President of Harvard University got into big trouble for saying that he thought men were innately better at math than women. Others argued that men aren’t naturally better at math. They said women are not encouraged to do well in math when they are girls, so they don’t do as well when they grow up. Neither side had any proof for their belief, so a couple of scientists decided to do a little research and find out which side was right.

They looked at math test scores. Researchers looked at how many boys and how many girls scored at very top of the tests. Then they looked those students who scored in the middle. They also looked at how those scores changed over time.

At the high end of the scale, they found that girls are catching up with boys. And they found no difference in general between the number of girls and boys who scored in the middle. It seems that boys don’t have more of a natural talent for math than girls do. What does makes a difference is how well you are encouraged to learn and enjoy math, whether you are a girl or a boy. Teachers and schools need to get rid of the idea that boys are better suited to do math and do more to encourage girls to like the subject.

One other big story in the science this week, we are heading to the Moon again. The Lunar Reconnaissance Orbiter was launched last week. It will take pictures of the Moon with the hopes of finding new landing sites. After it does that, the Orbiter will crash part of its rocket into the surface of the moon. Scientists will look at the dust and dirt the crash throws into that air. They hope to find out what lies beneath the surface of the Moon, maybe even find some water. Cool, huh.

Hope you had a good Father’s Day and a good first day of summer!

June 15, 2009:

So, have you ever caught your dog doing something it shouldn’t and seen a ‘guilty look’ come across its face? Bad dog. Bad dog. But science now suggests that you, not your dog, has something to feel guilty about.

Researchers at Barnard College in New York took a set of dogs and owners. Owners left their dogs in a room after telling them not eat a tasty treat. Some dogs got the goodies, some didn’t. Then the researchers told some of the owners that their dogs ate the treats even when the dogs had not. Those owners then gave their pets a talking to and reported the dogs had a guilty look. So it seems that it didn’t matter if the dog had eaten the treat or not. If the owners thought the dog was guilty, the owners reported a guilty look on the dog’s face. Researchers concluded that the “guilty look” is a result of the owner’s behavior and not the dogs.

Why is this important? Well, it shows we humans sometimes think animals pick up human traits. This is called anthropomorphism. So, if you are going to study animal behavior, like does a dog feel guilt, you have to be sure you aren’t just seeing something that really isn’t there.

Is this true of other pets? I don’t know. What do you think?

Just a couple other bits of science news for the week… The World Health Organization has declared a pandemic of the swine flu. That means there are enough cases spreading all over the world that health officials may need to take new steps to deal with it. So far, the swine flu isn’t too severe. It is no fun to catch, but isn’t as life threatening as other forms of the flu. That is good news. Still, when flu season rolls back around next fall and winter, it will be a good idea to follow basic health rules: Wash your hands. Cough into your elbow. And, if you feel sick enough, stay home.

And scientists report that gray hair is a sign of stress. Tell that to your parents!

June 8, 2009:

I have two bits of science news this week that involve your sight. Have you ever heard the phrase “seeing the world through rose-colored glasses”? They say if you see the world through rose-colored glasses, you see the positive side of things. Sometimes it means you aren’t seeing things the way they really are. Well, scientists report this week that that people who are in a positive mood actually see better.

University of Toronto researchers gave two sets of people, one set in a good mood and one set in a bad mood, an image to look at that had a face in the center surrounded by “place” images, such as a house. The people were asked to focus on the person and tell whether it was a man or a woman. Then they were asked to describe the place around the face. Folks in a good mood were able to describe the place image, while the people who were in a bad mood couldn’t do it as well. It seems there was a change in the brain that allowed positive people to see more of the details.

Now scientists say there is a good and a bad side to this finding. The positive people were able to see the whole picture, but they weren’t able to focus on one thing quite as much. Someone in a bad mood might be able to block out other things and focus on that single task more easily. Of course, they might miss details they need to do the job. It is an interesting challenge. Is it better to focus or see big picture?

Speaking of focus, many of us wear glasses or contacts so we can see better. Some kids may not like wearing glasses because they think it makes them look ugly. But a new study says they are wrong. A survey of children between 6 and 10 reports that children think other kids who wear glasses are smarter and more honest. So, if you need glasses, wear them with pride, even if they are rose-colored!

June 1, 2009:

Have you ever played a Lituus? No, it is not the latest video game. It is an 8 and a half-foot long trumpet-like instrument. People stopped using them about 300 years ago. Unfortunately, that also meant people stopped making them too. Today, We don’t really know what a Lituus looked or sounded like. So researchers at Edinburgh University decided to try to make one. They looked at old paintings of musical instruments like the Lituus and then used computer software to figure out what it might have sounded like. They eventually built two copies and turned them over to musicians to try them out. They are kind of tough to play and have a unique sound. Bach, a famous classical composer, used a Lituus in some of his work because of the instruments haunting sound. And thanks to science, we can all hear Bach’s work as he originally composed it. Cool.

May 26, 2009:

Hope you had a great Memorial Day holiday. Did you get out in the sun? Did you use sunscreen? Odds are against it and that, according to scientists, is not good. A survey from the Consumer Reports National Research Center reports that 31 percent of Americans never use sunscreen and 69 percent use it only occasionally. You should be using sunscreen on your face and neck every day!

The sun puts out UVB rays. Those rays can damage your skin. You notice it as sunburn. Over time, damaged skin can develop skin cancer. But sunscreen protects your skin from UVB rays. Scientists say it is especially important for young people to protect their skin as studies have links bad sunburns when you are young to skin cancer when you are old. Scientists also say it is important to get out in the sun every day because it helps your body. So get out in the sun, but take my advice and use sunscreen!

And enjoy your last few days of school and keep checking back here over the summer. Watch some videos from shows you haven’t seen. Send me an email. We won’t have another live show until September, but the D4K Web site is always here to explore and I’ll blog each week about fun science news.

May 19, 2009:

Birds of Prey are fascinating to watch. Check out these links to watch a family of Peregrine falcons who have made their home at the top of the One Capital Center in downtown Boise.

Fiberpipe's live feed. | Peregrinefund's feed.

If you want to learn more about Birds of Prey, check out this week’s broadcast show or the Birds of Prey Web Extra. This was our last live show of the 2008-2009 school year. We will be back with a new season of programs starting in September. I will spend the summer preparing for those shows AND I will still be doing my blog. So check it out each week for the latest, most interesting science news.

Oh, one more thing, thanks to Norm at Echo Films for letting us use some of his spectacular footage for the Birds of Prey shows. I ran out of time on the live show to express my appreciation. Thanks Norm!

May 11, 2009:

If I could wish for something for you all, according to science, it would be to have a good Mom. Now Dads are important, no doubt, but scientists at Tufts University report that genes you get from your Mom have a lot more to do with how you turn out.

Genes determine how our body works and whom we turn out to be. We get half our genes from our Mom and half from our Dad. Researchers now think that it is the genes you get from your Mom that decide how those genes are first “expressed.” Genes “express” themselves in different ways. They determine how we look, if we are naturally athletic, even if we are more likely to get a deadly disease. Apparently, your Mom’s genes have more say than your Dad’s genes, especially if you are a mouse.

Scientist Larry Feig and his colleagues at Tufts University took a female mouse and gave her an education. In a mouse world, an education comes from living in an “enriched environment.” We know that mice that live in a more interesting place become smarter than mice that hang out in a bare cage. The researchers followed the educated mouse from her youth. When she grew up, she was put in a boring cage and than mated. Her pups, who had never lived in that “enriched environment” still turned out smarter than pups who came from a mom who had never had an education. They also found that the pups of a wise mom were smarter than their peers, even if a different, not-so-educated mom raised those pups. The education level of the dad mouse apparently had no effect.

This is not to say Dads aren’t important. They are. But since we just celebrated Mother’s Day, I thought I’d give you another reason to tell your Mom thanks!

Be sure to get your questions in about Birds of Prey for our next live D4K. That program will be broadcast on May 19th at 2:00/1:00pm Mt/Pac on Idaho Public Television or live streamed here on the web site. Email a question here or check out the Birds of Prey web site.

May 5, 2009:

This is exciting! We have our first prime time D4K special this week. We are celebrating our 10th anniversary with a look at some of our favorite video shorts and studio moments. Watch the one-hour special Wednesday, May 6 at 8:00 pm on Idaho Public Television. You can watch the promo for the D4K 10th Anniversary show by clicking here. The show itself isn’t encoded yet so it isn’t available on-line. I’ll let you know when you can see it on-line.

And just a reminder, our last broadcast show for this school year airs on May 19th. Send in your questions about birds-of-prey.

April 27, 2009:

Astronomers, scientists who study the stars, have found a giant dust cloud in the center of the Milky Way and they think it might taste like raspberries. Yup, raspberries.

First some background . . . The Earth is a planet in the grouping of stars called the Milky Way. Radio Astronomers in Bonn, Germany were searching space for amino acids. Amino acids are one of the basic chemicals from which life is created. They look for very small parts of those chemicals called molecules. Find the molecules and you've found the substance.

So, these astronomers were looking at a region near the Milky Way's center. It was a gas cloud that surrounds a newborn star. The scientists studied the chemical properties of the molecules in the gas cloud and found ethyl formate, the chemical responsible for the flavor of raspberries.

So, does space taste like raspberries? Perhaps. Ethyl formate is also the chemical responsible for the smell of rum. Now that is an interesting combination!

But I wouldn't suggest you run out and try to smell and taste this particular space cloud. Scientists also found a deadly chemical, propyl cyanide, in the same place. However, they say that this is actually good news. Both molecules are the largest yet discovered in deep space and are both part of the essential building blocks of life. They will continue looking and see what other berries they find in space (just kidding!)

Have a good-smelling, good-tasting week!

April 20, 2009:

Ever hear laughter is the best medicine? Scientists at Loma Linda University think it at least helps. According to LiveScience.com, researchers there found that laughter may improve the health of people with diabetes. Diabetes is a serious illness, nothing to laugh at.

The researchers split diabetes patients into two groups. Both groups received the same treatment except one group watched 30 minutes of something that made them laugh each week. After two months, the laughter group had lower stress hormones in their system. Humor, according to the researchers, gives people hope and hope is good for your body.

You know what else is good for your body, spending time outside with nature. Tomorrow, we have our next broadcast show all about nature deficit disorder. Watch it on Idaho Public Television at 2:00/1:00 p.m. Mt/Pac or live streamed here on your computer. You can also watch it afterwards here on your computer.

Be sure to send in a question so you and your class can be entered in a drawing for a DVD player, DVDs and other prizes. Oh, here is my joke for the day: Why did the chicken cross the basketball court? Because the ref was calling fowls. Hope you feel better.

April 15, 2009:

Sorry I’m a bit late this week. We have been working on the schedule for next season’s shows. My thanks to the teachers and others who suggested topic ideas. We’ll let you know what we decided to do next month.

I have been getting a few questions about next week’s topic. On Tuesday, April 21st, we will be answering your questions about “Being Outside.” A few of you have asked what that means and why is it important.

Being Outside is an effort to get kids outside. Health experts think not spending time in the out of doors is unhealthy. For the first time in human history, more than half of the world’s population lived in cities rather than in rural areas. That means more of us aren’t getting outside and spending time with Nature. More of us are inside watching TV or playing video games or working on a computer.

So, does science back up the idea that we humans do better when we spend time outside?

• One study of 80 to 85 year-olds in Tokyo found those who could get outside to green spaces had a lower rate of mortality. They lived longer.



• Another study found that children who had access to a neighborhood park had a reduced risk of being overweight.



• A 2001 study found that children 7-12 with Attention Deficit Disorder were able to do better after a “green” activity (one that took place in a natural setting, like fishing or soccer) than they did after a “non-green” activity (one like playing video games).

If you are thinking of questions for next week’s show, how about considering ways to add more outdoor activities in your life? How could educators move their classes outside? What kind of activities could your family do on your next vacation?

Whatever your question, send it here or call in live. The show airs on Idaho Public Television on Tuesday, April 21st at 2:00/1:00 p.m. Mt/Pac. Remember, when you send in a question, you and your class could win a DVD player, DVDs and other prizes.

April 6, 2009:

 

Do you look like your pet? It is possible. A study out of England showed that people can guess what breed of dog someone owns just by looking at the person’s picture.

According to a report in Live Science.com, a group of 70 people who do not own dogs were asked to match photos of 41 dog owners to one of three possible breeds- a Labrador, poodle or Staffordshire bull terrier. They matched the right person to the right dog more than half the time. Now, if it were just left to chance, they should have made the right match only one third of the time. The fact that they did better than chance supports the idea that we look like our pets.

Here is my picture and a picture of my pet Winslo. Do we look alike? I think we have the same twinkle in our eyes!

We are about to set the schedule for next season’s D4K. If you have any suggestions for topics, email them to me! I will send the first 10 teachers who submit an idea ten of our D4K Frisbees.

March 30, 2009:

Welcome back from Spring Break (for those of you who had Spring Break last week).

Did you play any video games while you were off of school? Well, it turns out that playing action video games may improve your vision. Scientists have discovered that playing video games with lots of action can improve your ability to see “fine contrast differences” by up to 58 percent. What does that mean? Well, with being able to see “fine contrasts” mean you can see small differences in shades of gray. That really is important. Scientists say being able to tell the difference between shades of gray is how we decide how well someone can see overall. We wear glasses or contacts to improve “contrast sensitivity,” that is being able to see small differences in shades of gray.

The scientists in this study tested the vision of 22 students. They then divided the students into two groups. One group played action video games. The other group played “The Sims 2.” The students played 50 hours over nine weeks and then the scientists tested the students’ vision again. They found the group that played the action games showed an average 43 percent improvement in their ability to see small differences in shades of gray. The Sims players showed no improvement. The scientists think playing action video games may train the brain and some how improve the way the brain processes the stuff you see.

Now, studies have also shown the violent video games are not good for kids, so don’t use improving your sight as an excuse to play those mature rated video games. But maybe you can find a non-violent action game and spend a little time seeing better.

March 23, 2009:

It is spring break for me and my family, but I thought I would pass along this bit of news. Mount Redoubt Volcano in Alaska has erupted five times! The volcano sent ash nine miles into the air and a bunch of air planes had to change their route or cancle their flights. Folks in Anchorage were getting a light dusting from the ash but so far no one has been hurt. Scientists knew something was up when the area had an earthquake on Sunday. If you want to see more about the volcano, go to the Alaska Volcano Observatory.

We are just starting to set the schedule for next year's season of D4K. If you have an idea for a show topic, send me an email. The first 10 teachers to submit an idea will receive 10 of our D4K Frisbees as a thank you. Sorry, you must be a teacher to get the prize...but hey, anyone can submit an topic idea so send your best suggestion! If this is your spring break too, enjoy!

March 16, 2009:

Another reason not to litter… NASA engineers are considering moving the International Space Station out of the way of some space junk.  An old Soviet satellite will zip past the station tomorrow (Tuesday) and is traveling at about 19,800 mph! If apiece of the space junk hits the space station, it could cause a lot of damage and put the astronauts there at risk.  There is a lot more space junk after two other satellites collided on February 10th and it is a real problem for engineers.  So next time your Mom or Dad asks you to clean up your junk, consider yourself to be lucky.  Your job is easier than NASA’s.

Have a question about Bears?  Now is the time to send it in.  We have our broadcast show Tuesday, March 17th at 2:00/1:00pm Mt/Pac.  Watch it live on Idaho Public Television or here on your computer or watch the archived version or the Web extra sometime after the live show.

Also, now is the time to send me any ideas for our next season.  We are looking at topics for 2009-2010.  Have an idea? Send it in!

March 9, 2009: Sorry I have been absent lately. Al Hagenlock (the D4K Director/Editor) and I have been busy creating the D4K 10th Anniversary show. Hopefully you had a chance to see it when it aired on Idahoptv. Al and I still have some tweaking to do on the show, but eventually it will make it to the Web site.

I didn’t forget my blog entirely while we were editing. I saved a couple of interesting science news reports for you. The first is the discovery of the earliest human footprints.

As reported in the journal Science, anthropologist John Harris and his colleagues found several footprints in Northern Kenya. They believe the footprints are 1.5 million years old. And just in case you were wondering, some of these ancient humans would have worn men’s shoes size 9. Check with your Dad or an older man and see if they wear a size 9. That will give you an idea how big the feet of some ancient humans were.

The other bit of science news I wanted to pass along comes form England. Researchers at the University of Essex have found a “genetic tendency to optimism.” That means scientists thinks being cheerful is something that runs in families. If you have older relatives who tend to be positive, than it is likely that you have a greater chance to be someone who sees the bright side of life. Scientists are trying to figure out why some people bounce back more easily from life’s stresses and now they think it may be something in your genes.

We are coming up on our next broadcast D4K show. On St. Patrick’s Day, March 17th, we will be answering questions about bears. Send in your questions or plan to call in live. Watch it on Idaho Public Television at 2:00/1:00pm Mt/Pac or here on your computer.

Oh, one more thing… I am collecting ideas for next season’s shows. If you have a topic you’d like us to do, send me an email. See you on the 17th and don’t forget to wear green.

February 16, 2009: Hope you had a happy Valentine’s Day. Did you get some chocolate? I hope you enjoyed it. Scientists report that chocolate is in danger. Because of farming practices, disease, global climate change, and other factors, the world may face a shortage of cacao beans, the primary ingredient in chocolate. Now that is BAD news. The good news is that scientists and officials in various countries are trying to solve the problems before your favorite Hershey bar costs $100.

One of the problems for cacao growers is changing weather. We will be talking about the weather tomorrow in our next broadcast D4K show. Send in your questions for our two meteorologists to answer. Watch the show live on Idaho Public Television or here on your computer at 2:00/1:00 pm Mt/Pac or watch the archived show here later.

Also, I am proud to announce that you can watch the best of the last ten years of D4K on our Anniversary Special. Check that out on Idaho Public Television on March 1st at 5:00 pm. Al Hagenlock and I are still working on the show, but I think you and your parents will enjoy it! Be sure to tune in.

February 9, 2009: If you like frogs, you are in for some good news. Scientists report they found as many as ten new species of amphibians in the jungles of Columbia and a dozen new species in the forest of India. It is good news because frogs and amphibians have been going through some tough times. They have been dying off because of climate change, fungal infections and other issues. Amphibians are considered to be an indicator species, that is when frog are in trouble so is the habitat in which they are living. And that could spell trouble for humans, plants and other species in the same place.

The new Columbian frogs include three types of glass frogs, three types of poison dart frogs, two species of rain frogs, a salamander and a harlequin frog. View pictures of the Indian frogs on the MSNBC site.

Be sure to send in a question about the weather for next week’s broadcast show. You and your class could win a DVD player and DVDs if your question is picked. You can see that broadcast show on Tuesday, February 17th at 2:00/1:00 pm Mt/Pac or watch it live here on your computer. You can watch the archived version of the show or our Web Extra later in that same day. Tune in!

February 2, 2009: Hi, sorry I have been absent lately. I'm afraid January was a busy month, including some travel, so I haven't blogged for a while. But I'm back and with some bad news.

Punxsutawney Phil saw his shadow. America's furriest weather forecaster says we are in for six more weeks of winter. According to legend, this groundhog comes out of his burrow on February 2nd. If he sees his shadow, we can expect more snowy weather. If he doesn't, we get an early spring. Now an upstart groundhog in New York City didn't see his shadow, but true Groundhog fans say the NY guy is a fake. For 120 years, folks have been gathering in Punxsutawney, Pennsylvania to see what Phil has to say. So, how accurate is Phil? According to groundhog.org, he is never wrong. I'm not so sure. What do you think?

If you want to know what tools meteorologists really use to forecast the weather, tune in on February 17th for our next D4K broadcast show. We'll be taking your questions about the weather. Send in a question now.

Just one more science note because I've been away so long… Scientists have discovered that cows give more milk if they have a name and are treated as individuals. Researchers at Newcastle University report that farms where each cow was called by her name showed a higher milk yield than farms where cows were herded as a group. So one-on-one attention is good for cows and people too. Science marches on….

December 31, 2008: Happy New Year! I hope you have a good celebration to start 2009. I thought I would use this last blog of the year to pass along the top science stories of 2008. In no particular order, here they are:

1. Water on Mars: NASA's Phoenix Lander explored the polar region of Mars and discovered water ice. Scientists believe there could have been a lot of water on Mars at one time and maybe Mars could have supported life of some kind.
2. Golden suit: 23 of the 25 swimmers who broke world records at this year's Olympics were wearing the new LZR Racer bathing suit from Speedo. The suits were especially designed to reduce drag (see the Force and Motion show to learn more about drag). The suits are made from a special fabric and the seams are ultrasonically welded.
3. Bending Backwards: Scientists have taken a step toward creating invisibility. Researchers at the University of California, Berkeley were able to bend light backwards. That means the light looked like it was bouncing back at the viewer, so you wouldn't see what was in front of you. They hope to use it to make new microscopes to can see DNA molecules. I like the idea of an invisibility cloak!
4. Splitting the Sun: MIT chemistry professor Dan Nocera developed a way to use the sun to split water molecules and makes usable energy. He used a process similar to how plants operate. This could mean a clean source of energy. Now that's news!
5. Gecko Feet: Scientists have long wondered how Gecko's can climb upside down. Now they know. Researchers discovered that gecko's use magnetism. The tiny hairs on a gecko's feet get so close to the molecules of the wall that they form a tiny powerful attraction.
6. More Gorillas: Scientists think they have found more gorillas. It is hard to estimate how many there are in the forests and swamps of the northern Republic of Congo. Scientists did some surveys and think there are now 125 thousand gorillas there. That is twice the number before. Unfortunately, war in that part of the world still threatens this very endangered population.
7. Smarter Scientists, sort of: Researchers believe Americans have gotten a little bit smarter about science. Political scientists at the University of Michigan did a poll that showed about 25 percent of Americans are "civic scientifically literate." That means that only one in four can understand the stories in the weekly science section of the New York Times. I think that if you are reading this, you are probably one of the four!
8. Big Bang: Speaking of good news/bad news. The Large Hadron Collider went on line in 2008. This is a massive particle accelerator on the Swiss-French border. This device will be used to study the particles not seen since the Big Bang. This is an amazing advancement in science, but it has been stopped by a helium leak. Repairs are underway and they should continue studying the universe in June.
9. Exoplanets: For the first time this year, astronomers saw planets orbiting other stars. They used special telescope techniques to distinguish the planets' faint light from the stars' bright light.
10. Scientists who said they found Big Foot were proved wrong. Sorry about that.

My thanks to the Boston Museum of Science, the Science Channel, the Omaha Science Examiner, Science magazine, Time magazine and The Hindu for their help in drawing up this list. Have a Happy New Year and check out my blog in 2009!

December 24, 2008: Happy Holidays everyone!

Science has come to the rescue of all cookie bakers. In an article for NPR, Food Scientist Shirley Corriher had some good ideas about how to fix common problems with cookies. Do your cookies break up after you pack them in a package to give as a gift? Corriher suggests adding a tablespoon of water to a cup of flour that's going to be used in the cookies. Why? Because flour is made up of proteins and when you add the extra water the flour becomes a "springy stretchy, strong elastic sheets of gluten." The gluten is what holds the cookies together, she says.

Do your chocolate chip cookies spread too much? Corriher suggests chilling the dough in the refrigerator overnight before baking. She also suggests using bread flour because it is higher in protein. So, make some cookies and share some science!

I also received this press release from NORAD yesterday.

PETERSON AIR FORCE BASE, Colo. ­ Members of North American Aerospace Defense Command are preparing to track Santa again this year, and are working to accommodate the jolly fellow's change in flight schedule. Santa, according to NORAD, will launch two hours later than he has in previous years. They didn't exactly say why, but rumor has it that Santa changed his departure time because too many kids were awake when Santa arrived at their houses and he had to come back later. You can track Santa's progress at www.noradsanta.org or, new this year, people can get updates on Santa's travels using Twitter. Follow @noradsanta once logged in to www.twitter.com to not only track Santa but to participate in Twitter holiday conversations. Check with your parents first! Also, on December 24th, you can call Santa at 1-877-Hi-NORAD (1-877-446-6723). You can also send him an email to noradtrackssanta@gmail.com. Have a Merry Christmas and a Happy Hanukah!

December 16, 2008: You know how some days seem longer than others? Well this year, December 31st will actually be longer than most days. The U.S. Naval Observatory is going to add a "leap second" to the world's clocks. On December 31st, the day will be 86,401 seconds long.

Historically, time was based on the earth's rotation around the sun. But when scientists invented atomic clocks, they were able to calculate time more accurately. So they have two time scales, one based on atomic clocks and one based on the earth's rotation. The problem is that, because the earth's rotation is very gradually slowing down, the two time scales get off. So the International Earth Rotation and Reference Systems Service, the group that keeps track of time for the world, has called for the addition of a "leap second" to get the time scales back in sync. This is the 24th time a leap second has been added to the Coordinated Universal Time (UTC). The last time was on December 31, 2005. If you want to keep track of time, click here for the U.S. Naval Observatory's Master Clock.

Tuesday will be our next live broadcast show. Be sure to send in your questions about the planets. Check out the show on Idaho Public Television or here on the Web site at 2:00/1:00 p.m. MT/PT, or watch the archived show afterwards. You can also check out our planet video short or web-only show.

December 10, 2008: Are you happy? Find someone who is and become his or her friend. It turns out that happiness may spread like germs. Research from social scientists in England reports that those who surround themselves with happy people are more likely to be happy themselves. Scientists know that we are influenced by other people's moods, but this study shows that happy people tend to form their own groups, or social contacts. If you are a part of a group that is made up of happy people or come in contact with those people, you are more likely to pick up on the happiness. Kind of like ripples in a pond, happiness spreads.

Envy, it turns out, is another emotion making science news this week. Researchers found out that dogs experience envy. Scientists were trying to learn more about emotions and animals. They knew that monkeys get resentful if a partner received a greater reward for doing the same task. But do dogs? In new research, scientists found that indeed dogs reacted differently to unfair food distribution. They "felt" envy. So, there is a similarity between humans and their dogs.

If you don't want to be envious of other students and if do want to spread some happiness, send me a question about the planets for next week's broadcast show. We will be answering your planetary questions at 2:00/1:00 p.m. MT/PT on Tuesday, December 16th. Watch it on Idaho Public Television or here on your computer.

By the way, the biggest and brightest full moon of the year will happen the evening of December 12th. The path of the Moon's orbit will put it closer to earth than it has been all year, so the full moon will look 14% bigger and 30% brighter than it has all year. If you have clear skies on Saturday, check it out. The best time is just when the moon is near the horizon. Send me a picture if you have a chance!

December 1, 2008: Check out the skies tonight, Monday, for a cool sight! The planets Venus and Jupiter are close to each other and the crescent moon. Check out the horizon early in the evening. You'll see two bright lights near the moon.

The crescent moon is pretty cool looking too, with earthshine dimly lighting up the rest of its face. We will hope for no clouds tonight so you can see it. This planetary show won't last long and the planets won't line up like this again until 2052, so take some time tonight for stargazing.

And if you want to learn more about planets, be sure to check out our Planets site. I'm taking questions now for our next broadcast show all about the planets. Send one in and be entered in our drawing for a DVD player and other prizes. The Planets show airs December 16th at 2:00/1:00 p.m. MT/PT.

November 24, 2008: Happy Thanksgiving! I am very thankful for all of you who check out my blog and the D4k site. I am thankful for those of you who call or email in questions for our broadcast show. I am thankful for the folks with whom I work here at Idaho Public Television and I am thankful for science and scientists. Here's a cool story for this week — it deals with light waves, guinea pigs, and the deaf.

Scientists at Northwestern University in Illinois are shining infrared light on the nerve cells in the inner ear of deaf guinea pigs. Sounds a bit odd, I grant you, but what they have discovered is pretty interesting. It turns out that you can use light to help the deaf hear.

Some deaf people have a cochlear implant. A cochlear implant is a tiny electronic device implanted in a deaf person's head that stimulates the nerve cells in the ear and helps that person to hear. But cochlear implants aren't as good as regular hearing. People with cochlear implants have a hard time in noisy places or hearing music well. But doctors found that when they stimulated ear nerve cells with light, the brain reacted like it had heard a sound. Dr. Claus-Peter Richter shone infrared light into the inner ears of deaf guinea pigs while measuring electrical activity between the inner ear and the brain. He found the light did a better job of causing brain activity than the cochlear implants did. Now it is a big step from a guinea pig to a person, but it is a promising start. It is something for which we can be thankful!

November 18, 2008: Well, that was a first. My guests for today's show about robots didn't make it to the studio in time for the live show. John Sosoka, UGOBE's Chief Technology Office, sends his apologies and regrets for missing the show.

Well, sometimes things happen and you just have to figure out your options and move forward. We were lucky that we had a good show "in the can." Idaho National Laboratory scientists Matthew Anderson and Mark McKay answered questions about robots back in 1999. That was our first season! Anyway, if you want to see what I looked like nine years ago, check out the archived show.

Because we had no new guest, we did not do a Web extra program, but the new video piece on robots is available. Check out that video to learn how UGOBE built Pleo, a robotic baby dinosaur.

I really appreciate everyone who emailed and the few folks who called in their questions. We will put everyone's name into the hat for this month's drawing, so your efforts weren't entirely wasted.

Don't give up on us. Our next broadcast show will be on December 16th and we will be taking questions about the Planets. I promise I will do whatever I can to make sure the guests show up!

November 17, 2008: Check out our new broadcast D4K show on Tuesday. We will be taking questions about Robots! You can send in your email or tune in live either here on the website or over-the-air on Idaho Public Television at 2:00/1:00p.m. MT/PT. The show and the web-only program will be archived here on this site later in the day so, if you miss the live broadcast, you can watch it here. More science news later!

November 10, 2008: Boy, you can tell I wasn't with it last week. At the end of last week's blog, I encouraged you to send in questions for out next broadcast show on planets. Oops! Our next show is actually all about Robots. We will discuss planets in December. Sorry about that. I am already getting questions about robots and it should be a great show. Check out the website and send in your questions.

ABC News has an interesting report about sharks and golf balls this week. Sharks can swim really fast, up to 50 miles per hour. Scientists were trying to figure out how. It turns out that sharks can raise the scales on their skin. This unevenness creates little hill-and-valley like pockets across the surface of their skin just like the dimples on a golf ball. Scientists already know that the dimples on golf balls helps cut drag. When you hit a golf ball, it flies through the air. Now, the air rushing past the ball forms little whirlpools within each of the dimples. This extra layer of air acts as a buffer and helps the ball move faster. Sharks apparently take advantage of the same physics. With less drag, a shark can swim faster and golf balls can fly farther.

Amy Lang from the University of Alabama in Tuscaloosa and her colleagues discovered the difference when they created artificial sharkskin with those raised scales. They put the skin through water tests and found the speedy effect. Lang says, "It's like the difference between pushing a box over ball bearings instead of dragging it along the floor." Scientists think they can now use this discovery to improve the design of things like underwater vehicles.

Have a great week and send in those questions about ROBOTS!

November 3, 2008: Junk falling from space, a Presidential election, and a cool meteor shower . . . lots of news on a planetary scale this week.

A refrigerator-sized piece of space junk fell into the South Pacific Sunday night. The junk was a tank full of ammonia coolant from the international space station. Astronaut Clayton Anderson threw it overboard during a spacewalk in July 2007 because it was no longer needed. The space junk fell in the ocean somewhere between Australia and New Zealand.

Tomorrow is Election Day, even if you are floating in space. NASA astronauts Michael Fincke and Gregory Chamitoff will vote from the International Space Station. Texas Law allows their votes to be sent electronically from space and then counted. In the last 50 years, only four Americans have been allowed to vote from space. That's because the Texas law was only passed 11 years ago. Another good reason to vote tomorrow: to elect legislators who think beyond the earth's atmosphere.

And finally, look to the skies between November 5th and November 12th for the Taurid meteor showers. You should be able to see 10 to 15 meteors per hour after the moon sets. Moonlight makes it kind of hard to see. The Taurid meteors are the leftovers from Encke's Comet. Scientists think that this year the shower will include a few unusually bright meteors known as "fireballs." Meteors create streaks of light when they burn up in the atmosphere. I don't know if they make bigger shooting stars than tanks of coolant, but they are still cool to see.

Something else cool to see . . . check out our next D4K broadcast show on November 18th. We will be taking your questions about robots.

October 27, 2008: Dance. Dance. Dance. That's how scientists jokingly describe a new find of dinosaur footprints on the Arizona-Utah border. Paleontologists found more than 1,000 prints inside the Vermilion Cliffs National Monument. At first, everyone assumed the marks were just holes caused by erosion. But when research established that four dinosaur species had lived in the area, scientists took another look at the holes. Professor Mark Can from the University of Utah thinks the area was probably a watering hole from the late Jurassic Period. He thinks there were mothers walking around with babies. He says you can even see tail marks in the rocks, a rare find. Scientists think the prints were locked in the sandstone after being covered by shifting sand dunes.

If you want to hear what stars sound like, click on over to the BBC. A group of scientists using France's Corot space telescope recorded the sounds. It's called stellar seismology. Scientists use the recording to tell different things about what's happening to the star. The sounds stars make depend upon their age, their size and their chemical composition.

If you didn't have a chance to see it, check out last week's new broadcast show and Web Extra on habitat. They are both very interesting. Or, if you are in the Halloween mood, check out our website on bats! Happy Halloween!

October 20, 2008: We have a live broadcast show up tomorrow (October 21st). Watch it here on your computer or on Idaho Public Television at 2:00/1:00 p.m. MT/PT. Email in your questions about Habitats. Be sure to check out the Habitat website too.

I'm jumping the gun a bit here, but here's a science story better suited to our planets show scheduled in December. School children and others are participating in the Great World Wide Star Count from October 20th to November 3rd. The Great World Wide Star Count helps scientists map light pollution globally. What is light pollution? Well, bright outdoor lighting makes it more difficult to see stars. Your eyes just can't see the fainter light of stars in the face of a streetlight, for example. It is annoying to us, but it is an especially big problem for scientists who are trying to study the stars.

The Windows to the Universe project at the University Corporation organizes the Great World Wide Star Count for Atmospheric Research (UCAR) in Boulder, Colorado. This year, star-watchers in the Northern Hemisphere will look for the constellation Cygnus. Those in the Southern Hemisphere will look for the constellation Sagittarius. Participants can look outside their homes or go to places where there is less light pollution. Participants report on what they see, and UCAR then builds a map of star visibility around the world. If it is cloudy, participants can report on cloud cover and that will be added to the map.

Dennis Ward from UCAR says, "Without even being aware of it, many of us have lost the ability to see many stars at night. Part of our goal is getting people to look up and regain an appreciation of the night sky." If you are interested in getting involved, here's a link to UCAR.

October 13, 2008: Happy Columbus Day! Scientists are explorers too, and some researchers have discovered quite a find in a most unusual place.

Scientists have found a bug that could give us a clue whether life could exist on other planets. Desulforudis audaxviator is a microbe or a tiny bacterium found inside a gold mine in South Africa. This bacterium lives almost two miles beneath the surface of the Earth in total darkness and without any oxygen. It apparently relies on water, hydrogen and sulphate for its energy. The microbe lives entirely alone, making this the first known ecosystem with a single biological species.

Dr. Dylan Chivian from California's Lawrence Berkeley National Laboratory, whose team gets credit for this find, notes that early Earth and other planets didn't have much oxygen on them. He says if life forms were to develop, they would need to use chemicals like sulphate to get their energy. They will study Desulforudis audaxviator and find out more over then next few years.

All life forms need a habitat that provides them with energy to survive. Desulforudis audaxviator lives in total isolation and miles under the ground. What is your habitat like? You can find out more about all kinds of habitats on our next broadcast show. Tune in on October 21st at 2:00/1:00 p.m. MT/PT on Idaho Public Television or here on the website. Send in your question and you'll be entered into our contest for a DVD player and DVDs.

October 8, 2008: Sorry my blog is a bit late this week. It has been a busy place around here and I'm not the only one with something new on her plate. In Brazil, scientists have found a new species of ant. It's called a Martialis heureka. It has no eyes. Its body is pale and its mouthparts are longer than the rest of its head. Christian Rabeling from the University of Texas at Austin gets credit for the discovery. He says the Martialis heureka appeared on Earth earlier than any other ant living today. Scientists think it is blind and pale in color because it lives underground.

Scientists also reported some good news and some bad news this week. The bad news is one in four mammals are facing extinction. The threats seem to come from hunting and destruction of habitat. If you want to learn more about this, be sure to tune into our next D4K broadcast show. We will be taking your questions about habitats. Email them before the show and watch the show over the air or on line on October 21st at 2:00/1:00 p.m. MT/PT.

This week's good news is that an asteroid that was heading on a course to collide with the earth will burn up once it gets into our atmosphere. That's good news because it means the asteroid won't destroy the Earth and because it is among the first times scientists have been able to identify and track an asteroid long before it heads toward our planet. Finding, tracking and predicting the path of asteroids that are headed toward Earth is very hard and this was a sign scientists are getting better at doing all that.

Here's hoping your week has good news in it!

September 30, 2008: The wind is blowing at a 50-year low . . . but not the wind here on Earth. Scientists say solar winds are blowing about 20-25% less hard and about 13% cooler than they were during the last solar minimum. The solar wind is a stream of charged particles or plasma that is shot out from the sun. These particles head out into space, creating a Heliosphere or a bubble of wind material that surrounds the Sun and planets. Solar winds have a regular cycle where they blow hard sometimes and less at others. But scientists say the winds now are a lot less than they had expected.

So what does that mean? Well, the winds carry with them some of the Sun's magnetic field. That field helps protect the planets from high-energy cosmic rays that come from outside the solar system. We here on Earth are safe because we still have our atmosphere to protect us, but it may not be a good time to travel in space. Also, satellites are at greater risk of being damaged.

And why is this happening? Scientists aren't sure. If you want to learn more about plasma, check out our States of Matter video short. We'll be talking more about planets in our December show, so send your questions in and I'll hold onto them until then. Have a good week!

September 22, 2008: Happy first day of Fall! Fall, or the autumnal equinox, happened at 9:44:18 a.m. on Monday, September 22, 2008. The equinox happens twice a year when the Sun crosses the equator and the day and the night are approximately the same length, 12 hours of daylight and 12 hours of dark. For those of us in the Northern Hemisphere, the days will now get shorter. We will lose a few minutes of daylight each day until December 21st, the first day of winter and the shortest day of the year.

To keep you amused during these darker days, I am passing along some fun websites to check out.

There are 170 volcanoes around the world that could potentially erupt. Take a look at this site that tracks these volcanoes: http://volcanoes.usgs.gov/ You'll be glad to know that the volcanoes closest to Idaho, the ones in Yellowstone National Park, are calm. Whew! But if you are heading to Hawaii, watch out.

A few seasons ago, D4K worked with Zoo Boise to promote ways of saving endangered or threatened animals. Zoo Boise collects a little bit of its entry fee into a fund each year and then awards money to preservation efforts. Kids like you can vote on which program will receive the money this year. Go to the Zoo Boise web site, read more about the various nominees and vote!

I also encourage you to check out last week's Dinosaur program. It was great! You can also watch the video short or the web-only program. Have a bright first week of fall. I'll have more science news next Monday.

September 8, 2008: Do you have a favorite song? It might be the key to helping you remember elementary school when you are older. Dr. Catriona Morrison, a researcher from the University of Leeds in England, is studying why music helps people remember things from way in their past. Dr. Morrison asked people to remember something relating to the Beatles, one of the world's most popular music groups from the 60's and early 70's. The memories they came up with were almost always positive and folks could remember a lot of detail. It seems attaching music to an event may help humans remember that event years later.

Our first D4K broadcast show of the season is next week! We'll be talking about dinosaurs so get your questions in. You can email questions. Remember, if you send in a question, you and your class will have a chance to win a DVD player and DVDs for your classroom.

Be sure to tune into the Dinosaur show. It airs Tuesday, September 16th at 2:00/1:00 p.m. MT/PT. You can watch it on Idaho Public Television or here on the D4K Web site.

September 2, 2008: Elephants can't jump and T-Rexes didn't run fast. That's the news today out the University of London. John Hutchinson, a biologist at the Royal Veterinary College, studies how large animals move. First, about elephants. Using stop motion photography, Hutchinson filmed elephants walking and running. He discovered that their legs are not built like stiff columns, as previously thought. Instead, they are more flexible, more bouncy. Still, he reports, elephants don't jump. They don't have all four feet off the ground at once. Hutchinson also used computers to study how fast a T-Rex could run. His research shows that these big creatures were probably walkers rather than runners. Their legs just couldn't, ahem, stand up to the pressures of running at fast speeds. Want to know more about dinosaurs?

Our first show of the new school year will be all about dinosaurs. Check it out on September 16th. Be sure to send in your questions too and win a DVD player and DVDs for your classroom.

August 25, 2008: Welcome back to school for many of you! After taking a few weeks off, I'm back to my weekly D4k blogging today. Check it out each week as I offer you one of the week's most interesting science stories. This week, it has to do with your nose.

All living things send out chemical signals to their fellow species when they are in danger or in trouble. The signals are called "pheromones." They are molecules and are very small. Scientists know pheromones exist, but they don't know what pheromones are made of and how animals and plants produce them. But now, scientist know how animals detect them.

These molecules float out into the air and go into your nose. A group of tight, round cells located near the tip of the nose, called the "Grueneberg ganglion," apparently picks the pheromones up and alerts you to the danger. Scientists knew about the Grueneberg ganglion years ago, but until now they didn't know what its purpose was.

Julien Brechbuhl and his colleagues at the University of Lausanne discovered the Grueneberg ganglion's role by comparing how normal mice and mice without Grueneberg ganglion react to alarm pheromones. Normal mice froze. The mice without the Grueneberg ganglion were unaware of the danger.

So, next time you seem to "sense" something is wrong, it may just be your nose doing its job.

My thanks to the American Association for the Advancement of Science (AAAS) for providing this story. Be sure to check out our new season of shows and our updated Web site next week!

July 14, 2008: All right guys, time to hang out with girls for a while. It might make you a better student. A study by psychologist Arlen Moller of Gettysburg College in Pennsylvania shows that preschool boys do better in school when they are in classes that have more girls than boys in them.

There is lots of debate about what's better for learning: classes with boys and girls together or classes that are only boys or only girls. Other studies have shown that in high school, girls may do better in all girl classes. But the results aren't as clear in junior high or grade school.

In this study, the researchers looked at 70 preschool classes over a school year. They looked at the students' motor, social and thinking skills. They found that boys in majority-girl classrooms developed these skills more quickly. Boys who were in majority-boy classrooms didn't develop as fast.

And what did they find for girls? It turns out that the number of boys in a classroom didn't affect how the girls learned. What do you think of that!

July 7, 2008: Mercury is shrinking! That's a headline you don't see too often. We usually think of the planets in the solar system as staying pretty much the same.

But scientists at NASA say Mercury's diameter, that is the distance around the planet, has shrunk by about a mile over time. Scientists think the planet is shrinking because its core, the planet's center, is cooling. The core of the planet is made up of hot liquid. When it cools, it doesn't take up as much space; hence the whole planet is getting smaller.

Scientists are learning more about Mercury because the Messenger spacecraft flew by the planet last January. Messenger, by the way, stands for "Mercury Surface, Space Environment, Geochemistry and Ranging." This spacecraft will fly by Mercury three times as it prepares to settle into an orbit around the solar system's smallest planet in 2011.

If you want to learn more about planets, check out our D4K Planets website, or watch one of our videos on planets.

June 16, 2008: Old Faithful is the world's most famous geyser. A geyser is a hot spring that erupts a burst of steam and hot water. Old Faithful goes off once every 50-to-90-minutes. Now scientists think that the length of the period between eruptions has to do with the annual rainfall. Researcher Shaul Hurwitz and other scientists from Yellowstone National Park have discovered that when there is less rain, the length of time between eruptions gets longer and when there is more rain, the duration is shorter. Watch Old Faithful erupt.

Just so you know, there are less than a thousand geysers worldwide, with more than half of them in Yellowstone National Park. Old Faithful was named in 1870 and was the first geyser in the Park to be named.

May 27, 2008: Who would have thought that Idaho and the planet Mars have something in common? Researcher Michael Lamb at the University of California at Berkeley does. Lamb and his colleagues studied Idaho's Box Canyon and have decided that it may tell us how water shaped the landscape on Mars.

Geologists had always thought that Box Canyon was formed slowly, with groundwater seeping through the canyon walls and wearing the rocks away in a process called erosion. These canyons are stubby and end with a round steep wall. They are called "amphitheater-headed" canyons. Geologists assumed other, similarly shaped canyons, including canyons on Mars, were formed in the same manner. But Lamb and his colleagues have decided that a massive flood formed Box Canyon about 45,000 years ago. The water probably came from melting ice sheets and would have blasted through the canyon at an incredibly fast speed. If this is the case, Lamb says it is likely that megafloods occurred on Mars and created similarly shaped canyons there.

If you want to learn more about rocks and minerals in Idaho, be sure to check out our most recent broadcast show. You can also find out more on our rocks and mineral site. And just a reminder, even though we won't have any new broadcast shows until September, there will be new postings here on my blog. There are also lots of interesting things to find on this web site, so check out a topic, watch a video short, a web-only show, or a full 30-minute program. Send me an email for the "Watt's up" section. School may be out, but D4K is always here!

May 12, 2008: While I wouldn't recommend having anything to do with an alligator, you might someday need its blood. Chemists Dr. Mark Merchant, Kemit Murray and Lancia Darville are working on ways to use alligator blood to create new antibiotics. Doctors use antibiotics to kill germs that make us sick. If you get a cut, and the cut gets infected with bad germs, it can turn red and puffy. But these chemists noted that when alligators get cut, they don't get this kind of infection even though they live dirty, germ-filled water. Why?

It turns out alligator blood contains materials that work like antibiotics. In laboratory tests, gator blood seems stop a number of the Earth's worst infections, so the researchers hope to turn the proteins in alligator blood into new medicines.

One more roundup of scientific news in honor of Mother's Day. It turns out that scientists have concluded that if you have a good Mom, you will probably live longer and healthier and be smarter and happier. Researchers found that good mice Moms, the ones who licked and groomed their pups, turned out pups that did better on mouse IQ tests. Researchers at the McGill University in Montreal found that mouse pups that were canoodled by their mothers grew into less anxious, more self-assured adults.

Scientists at the University of Tampere in Finland found human Moms are important too. Researchers videotaped infants 8 to 11 weeks old and their Moms and noted how much each parent and child interacted. Two years later, they found that those children who did not interact with their Moms tended to be sicker and had more chronic illnesses. So science proves good kids need good Moms! By the way, this research doesn't mean you don't need good Dads. Moms (especially mice Moms) tend to be the primary caregivers, so Moms were the focus of the research. But Dads can be primary caregivers too.

Be sure to send in your questions about rocks and minerals. We have a new broadcast show next Tuesday, May 20th. Email me or plan to call in live 2:00/1:00 p.m. MT/PT. You can watch the show on Idaho Public Television or here on your computer. The show and the Web Extra will be archived here on the Web site shortly afterwards.

May 5, 2008: Scientists have found what they think is the biggest animal eye. The eyes of the colossal squid measure eleven inches across. The human eye is only about an inch across. So this lady could really see! The scientists think that when the animal was alive, the eyes were probably even larger.

By the way, the squid itself is no small creature. It is about 34 feet long. A fisherman caught this one in the Ross Sea near Antarctica last year. Scientists don't know too much about this type of squid because only ten have ever been caught. They are dissecting the rare specimen in hopes of learning more about the animal.

Our next broadcast show is coming up soon. We'll be talking about rocks and minerals. Check out the show's Web site, and send in your questions.

April 21, 2008: A 'bionic eye' may give sight to those left blind by a hereditary disease. Scientists at London's Moorfields Eye Hospital are testing an artificial eye on two men who lost their sight to the disease retinitis pigmentosa. The 'bionic eye' is implanted in the back of the eye and is connected to a camera on a pair of glasses. The camera sends a wireless signal to a very thing electronic receiver and electrode panel. That panel is implanted in the eye and attached to the retina. Learn more about the eye from one of our previous D4K shows. Initially, doctors hope the men will be able to see light and dark outlines. They aren't sure if everything will work, but the doctors are hopeful. If perfected, the bionic eye may give sight to thousands of Americans.

If you want something to look at, check out our program with Idaho's Teacher-in-Space, Barbara Morgan.

One other note of interest, D4K received two (2) Emmy nominations! The National Academy of Television Arts and Sciences Northwest chapter nominated D4K in the Children/Youth program category, and the D4K "Web Extra" was nominated for best Children/Youth/Teen Advanced Media. This Emmy is given for programs designed exclusively for the Web. The Emmys for the Northwest region will be presented on June 7, 2008 in Seattle. Yippee!

April 14, 2008: Have you felt the ground moving? You might have if you lived in central Oregon. Scientists have detected an unusual number of earthquakes in that area. Using underwater microphones, the scientists picked up more than 600 quakes over the past 10 days in a basin deep within the earth about 150 miles southwest of Newport, Oregon.

Researchers aren't quite sure what these quakes mean. This type of quake usually happens before a volcanic eruption, but there are no volcanoes in this area. Scientists think that molten rock is moving away from recognized earthquake faults off Oregon shores. They hope to send research ships into the ocean to take water samples. They want to look for evidence that sediment has been stirred up. That might show that magma is on the move.

Speaking of moving, it's time for you to get moving and send in a question for this week's new broadcast show. Teacher-in-Space Barbara Morgan will be our guest for a one-hour special. That show airs at 2:00/1:00 p.m. MT/PT on Tuesday, April 15th.

Send in your questions via email or call in during the live show. You can watch it on Idaho Public Television or here on your computer. We will archive the show and the Web Extra shortly afterwards. Remember, when you send in a question, you and your class are entered into a drawing for a DVD player, DVDs and other prizes. I hope to hear from you.

April 7, 2008: DNA extracted from, well, poop, is making news this week. Scientists found some fossilized feces in a cave in Oregon. It shows that humans lived in North America more than 14,000 years ago, 1,000 year earlier than previously thought.

Researchers also learned that these ancient peoples were related to humans living in Siberia and East Asia. This suggests that these peoples came to North America from Asia over a land-bridge between Alaska and Siberia.

The ancient poop also gives scientists an idea about what these early humans ate. How's this for a diet: squirrels, bison, fish, grass, sunflowers, birds and dog.

Scientists call fossil feces coprolites. The oldest bit of coprolite being studied is about 14,340 years old.

If you are more interested in space than coprolites, here is your chance to talk with a real astronaut. Idaho's Teacher-in-Space, Mission Specialist Barbara Morgan is our guest on next week's D4K. She will be joining us from Houston for a one-hour special. Send in your questions now or call in live during the show. Check it out at 2:00/1:00 p.m. MT/PT on Tuesday, April 15th on Idaho Public Television or here on your computer. We will also archive the show afterwards AND do a Web extra with Barbara. So check it out!

April 1, 2008: For years, everyone thought that a recording of "Mary Had A Little Lamb" by Thomas Edison was the oldest known recording of the human voice. But scientists have discovered a song recorded 17 years earlier. In 1860, Edouard-Leon Scott de Martinville, a Parisian inventor, recorded, sort of, a bit of the song "Au Clair de la Lune." I say "sort of" because the recording isn't like any modern day recording. The French inventor used a "phonautograph." This invention scratched lines onto a piece of paper covered in soot from a burning oil lamp. The lines came from a needle attached to a diaphragm that responded to sound. The BBC has more on the story. You'll also find a link there to listen to this ancient piece of music.

I hope you had a chance to see our show on Amphibians. While you're there, you can also watch our web-only or video short pieces. Our next program is a one hour special with Education Mission Specialist, Idaho's Teacher-in-Space, Barbara Morgan. If you have a question for her, send it in soon. We are expecting more than a thousand questions. You can also call-in during the live show.

We are starting to decide what subjects we will feature next season. Do you have any suggestions? Send me an email.

March 24, 2008: Sorry I missed last week. We had a new show. Check out our program about amphibians, including facts and links as well as our Web-only video.

We are starting to build up to our next broadcast show with Barbara Morgan. If you have a question for her, get it in early. Last time Barbara was on, we had more than a thousand questions. Send in your question here.

My favorite science story of the week comes out of Harvard. Researchers there were testing the idea that good guys finish last. It turns out they were wrong. Being nice and fair helps you succeed.

Researchers watched 100 college students play the same game over and over. The theory was that punishment makes two equal players cooperate rather than compete. But when played over and over, punishment didn't seem to work as well. Working together, being nice, was the way to win.

The author of the study, Marin Nowak said, "We find that those who used punishment are losers." Those who escalate the conflict, or push punishment, often wound up 'doomed.'

So when playing the game of life, science seems to think, that they best way to play is to be nice.

Be sure to check out the amphibian pages. For those of you on Spring Break, have a great time!

March 10, 2008: Rats and frogs are not necessarily the best of friends, but they share one thing in common, the year 2008. According to the Chinese Zodiac, 2008 is the year of the Rat. But starting February 29th, it is also officially the year of the Frog. The Association of Zoos and Aquariums is promoting 2008 as the Year of the Frog because, they say, frogs are going extinct. The World Conservation Union estimates that at least one-third of known amphibian species are threatened with extinction.

If you want to learn more about why amphibians are in trouble, tune into next week's live broadcast show. Scientists will be in the studio to answer your questions about amphibians. You can see it here on your computer or on Idaho Public Television on March 18th at 2:00/1:00 p.m. MT/PT. You can also catch the web extra or the full half hour show after that here on the D4K site. Be sure to email your questions or call in live.

March 3, 2008: You are what you drink, or at least your hair is. Scientists have discovered that they can figure out where you live and where you have been based on the chemical makeup of your hair. And they can do this because of the water we drink.

Remember, water is made up of hydrogen and oxygen atoms. These atoms can vary in how much they weigh. Different forms of a single element like hydrogen or oxygen are called isotopes. And scientists know that tap water in different parts of the world contain unique proportions of heavier and lighter hydrogen and oxygen isotopes.

Now, water makes up more than half of an adult's body weight. Our bodies break down water as part of the digestive process and parts of the water we drink end up in our hair. So environmental chemist James R. Ehleringer from the University of Utah wondered if he could learn where you live based on the amount of isotopes found in your hair.

He and his colleagues collected hair samples from 65 cities in 18 states and found that hair from a specific spot matched the concentrations of isotopes found in that spot's water supply.

Even if you drink bottled water, Ehleringer and his team say your hair will still give you away because you probably use tap water for your cooking and because milk and soft drinks contain large amounts of water from within a local region.

Now, Ehleringer says the technique can't pinpoint a person's exact location because similar types of water can be found in rather broad regions. But it can help narrow down the search, especially for police who use hair samples to investigate criminals or to help crime victims.

These maps illustrate how the concentrations of certain hydrogen isotopes (top) and oxygen isotopes (bottom) in water differ throughout the United States. Red areas are where concentrations of these isotopes are highest. Blue points to regions having the lowest concentrations.[From the Proceedings of the National Academy of Sciences].

February 25, 2008: The frog from hell, that's quite an introduction. Scientists have unearthed a fossil of a frog believed to have weighed in at about nine pounds. They call it Beelzebufo, or "frog from hell." It was apparently quite different from frogs today. Its body was about 16 inches long, with short legs and a big mouth. Scientist Susan Evans, from the University College of London, believes the frog from hell might have been a scary predator. "Its diet most likely [would] have consisted of insects," she said, but it might have also eaten small dinosaurs. If you want to learn more about frogs, be sure to tune into our next broadcast show. We'll be answering your questions about amphibians on March 18th. You can send in your questions now, and you and your class will be entered into a drawing for a DVD player and DVDs.

Did you have a chance to watch the lunar eclipse last week? Here are a couple of pictures I took of the event. The next lunar eclipse we can see will be in 2010.

You don't have to wait that long if you missed last week's broadcast show on teeth. Take a couple minutes to look at the "Video Short" or the "Web Extra" programs.

February 18, 2008: Ever been head-butted? Apparently head-butting was the weapon of choice for one dinosaur. Paleontologists (scientists that study dinosaur bones) found the bones of two new meat-eating dinosaurs in Africa. The first was named "Kryptops palaios" or "old hidden face." Scientist Paul Sereno called it that because of a horny covering over its face. Sereno and his other fossil hunters named the second new dinosaur "Eocarcharia dinops," which means "fierce-eye dawn shark" for its razor-sharp teeth and bony brow.

Both dinosaurs were about 25 feet long and stood 7 feet tall. By studying the dinosaurs' teeth, scientists think Kryptops was a scavenger. His short snout was better for gnawing its food. They think Eocarcharia used its head to butt its rivals.

Scientists can tell a lot about a creature by looking at its teeth. Do you want to know how? Well, tomorrow, Tuesday, February 19th, I have a new broadcast show all about teeth. Check it out on Idaho Public Television or here on your computer at 2:00/1:00 p.m. MT/PT or watch it here afterwards on this website. Be sure to send in your question about teeth (link) so you can win a DVD player and DVDs for your classroom.

February 11, 2008: Researchers have come up with a new power source for your iPod or cell phone, and it is as close as your knee. Maxwell Donelan of Simon Fraser University in British Columbia and his colleagues have invented a device that looks like a knee brace. It converts the energy from a moving leg into electricity. When we walk, we generate energy. The hamstring muscle slows our knees, absorbing energy with each step. Donelan's device "harvests" the extra energy and converts it into electricity.

Volunteers wore the brace walking slowly on a treadmill. They found they could walk with the device without much bother and without much effort. But the payoff was pretty good. They could generate about five watts of electricity. That's enough power to run ten cell phones or twice the power needed to run a computer. That's good news for the millions of kids who live in places without electricity. Just think, some day you may take a walk around the block to check the Internet!

Two more things: if you are giving your Valentine a bunch of roses this week, be sure to also give a can of lemon-lime soda. Scientists at the University of Missouri report that lemon-lime soda can extend the life of cut roses.

Here is the whole recipe: 12 ounces of lemon-lime sofa (regular, not diet), 12 ounces of water, and half a teaspoon of bleach or mouthwash. If you have hard water, add a drop of dishwashing liquid. Once your Valentine gets his/her roses home, have them re-cut the stems under running water (very important to be cut under running water) and put them into your lemon-lime formula. That should do it. Science can make your love last — or at least your love's flowers!

Finally, remember we have a new D4K broadcast show next Tuesday, February 19th. Send in your questions about teeth! See the show on Idaho Public Television at 2:00/1:00 p.m. MT/PT or here online afterwards.

Happy Valentine's Day!

February 4, 2008: Happy Year of the Rat! This Thursday, February 7th, is the beginning of the lunar year in China. The Rat is the first of 12 animals on the Chinese Zodiac. People born in the year of the Rat are supposed to be leaders and pioneers and to like order. It is all based on an ancient Chinese philosophy.

Check out this chart and find out what animal you are. Remember, if you were born in January or early February, you are probably associated with the prior year's animal. That's because the Chinese New Year happens in early February, not on January 1st. I am an Ox.

I am also a fan of roses. And Japanese researchers worked for 14 years to develop a new blue rose. They created the rose by implanting the gene that makes blue pigments in pansies into a rose. The company says it will start selling them in Japan next year. They aren't saying how much they cost. So if you want a blue rose for your valentine this year, make it out of paper!

Be sure to send in your questions about teeth for our next D4K broadcast show. That program airs on Idaho Public Television on February 19th at 2:00/ 1:00 p.m. MT/PT.

January 28, 2008: What did the dentist see at the North Pole? A molar bear. What was the dentist doing in Panama? Looking for the Root Canal? What did the tooth say to the departing dentist? Fill me in when you get back.

Dental humor might or might not be your thing, but scientists now believe humor might help you learn more and might help your parents cope with difficult jobs. Researcher Melissa B. Wanzer, a professor of communication studies at Canisius College in Buffalo New York, wondered how health care providers for very sick people managed to go to work each day. The answer: humor. Workers who approached their job with a sense of humor coped better in tough situations. She also found that if a manager or teacher used humor appropriately, they were generally viewed as doing a better job. She reports that students also learn more when their teachers use humor effectively.

Now this is not to say your teacher should start each day with a stand-up routine, but a joke now and then and a good sense of humor can make everyone's day a bit better.

What does the dentist of the year get as a prize? A little plaque.

If you have a question for the dentist who will appear on our next broadcast D4K, send it in. The show airs on Idaho Public Television on February 19th and will be here on the D4K website after that.

One more thing — D4K was just honored with the Best Instructional Program (small market) award from the National Education Telecommunication Association (NETA). Yippee!

January 21, 2008: I hope you had a chance to see last week's show on Force and Motion. If you missed it, you can see the whole show, the video short, or the web-only extra from the show's video archive page. Check it out!

I've been doing lots of reading about teeth leading up to our show next month so this bit of science news caught my eye. Scientists think they may have come up with a better way to cure bad breath.

Halitosis, or bad breath, can be caused by germs that grow in your mouth. The germs live on the bits of food left on your teeth. If you don't brush and floss regularly, the germs grow. They excrete waste, using your mouth as a, forgive the term, toilet. Those waste products leave you with bad breath.

But scientists in Illinois report that breath mints made with magnolia tree bark extract kill the germs in about half an hour. Minmin Tian and Michael Greenberg tested the magnolia bark using spit taken from volunteers. They found the magnolia tree bark extract mints killed more than 61 percent of the bad breath making germs. That's 15 times better than your average breath mint.

They also found that the extract mints helped kill the bacteria that cause cavities. The scientists say the best way to stop bad breath and cavities is still brushing and flossing regularly, but any new weapon in the war against bad breath is important. There is one thing news reports about this discovery doesn't say. It doesn't say what the magnolia tree bark extract mints taste like!

Be sure to check out the Force and Motion videos and send in a question for February's broadcast show. It is all about teeth. Maybe the dentists coming on the show know what magnolia tree bark extract mints taste like!

January 7, 2008: Okay, I have a few more weird science stories of 2007 to report. MSNBC polled its readers and came up with its own list. Here are my favorites from their list:

• Glowing cat clones: Scientists in South Korean transferred genes into cloned cat embryos so the cats would glow under ultraviolet light.
• See-through frogs: I did report this on my blog when it made the news. Japanese scientist developed these frogs to study internal organs without having to dissect the frog.
•  
• Checker champion computer: Researchers at The University of Alberta in Canada have developed a computer program that figured out every single possible move in checkers. So, don't play against this guy. This computer will win every time.
•  
• Monkeys with good memories: Experiments with young chimps found they could perform memory tests faster than human and do them just as well. Hmmmm, maybe we should have the monkeys play the computer?

Now, time to look forward. We have a new broadcast show all about force and motion for January 15th. Send in your questions now and be entered in our contest for a DVD player and DVDs for your classroom.

December 31, 2007: Happy 2008 to you all! Before we jump into the New Year, let's look at some of my favorite science stories of 2007. Here they are, in no particular order:

* The weather was a big story in 2007. January was the warmest first month on record worldwide at 1.53 degrees above normal. And 2007 was shaping up to be the hottest year on record in the Northern Hemisphere. We here in Idaho felt the heat. Chilly Barton Flat (in Central Idaho) was singled out for its record high temperatures of 100 degrees for four days in July and August.

* Astronomers spotted the brightest supernova of a star ever observed in May. The star was 240 million light years away. A supernova is a star that explodes. This one was located in the galaxy NGC 1260SN. It burned for more than 250 days.

* Scientists all over the world discovered thousands of new species including:

• a rat the size of a cat in New Guinea
• a deep-water squid with fins like elephant ears and with 10 arms
• a black toad with purple rings in Suriname
• a new variety of clouded leopard on Borneo and Sumatra
• a medium sized, tree-dwelling primate call a highland mangebey in the mountains of East Africa

But, scientists also say that if global warming continues, 20% of the world's plant and animals may vanish. That's not good news.

* Archaeologists in China discovered the remains of a feathered, 16-foot-tall, 3000-pound flightless dinosaur. The 70-million-year-old Gigantoraptor erlianensis was found in Mongolia.

* Scientists learned that Neanderthals might have been redheads. Hey!

* Experts have found a way to make Light Emitting Diodes (LEDs) brighter and use less power than regular bulbs. This may mark the end of incandescent lights. Actually, that's good news because we all need to use less energy and this way, we will still be able to see in the dark!

* By the end of the year, the world's population will top 6.6 billion — that's 100 million new people since last year. Wow.

My thanks to Lisa Stein at Scientific American and Elizabeth Weise at USA ToDAY for their help with today's blog. If you have a minute, scroll down this page and check out some of the other science stories I highlighted over 2007. They include more about giant ancient scorpions, why you like chocolate, the oldest living creature (a clam), and a web of millions of spiders that covers acres in Texas, just to name a few.

Have a great 2008 and keep checking back here for fun science news!

Next episode

Tune in Tuesday, December 15 at 2:00/1:00 MT/PT to watch "Astronomy" on Idaho Public Television or here on the web.

Archives

We've kept all our previous seasons of D4K shows and websites online. Find links to all the D4K video and the show websites from our D4K Topics page.