PLUS (PT)

9:00 pm 

Nature  "Cracking The Koala Code"  Scientists track the day-to-day lives of an extended family of koalas in a forest pocket near urban Brisbane, Australia, to unravel what a forest needs to support a healthy population and how these slow-moving creatures react to the surrounding suburbia. Other scientists on St. Bees Island use solar-powered mobile phones to record koala vocalizations and begin to decipher some of the animals' communications.G

10:00 pm 

Wild!  "Tigers Fighting Back"  Across Asia, the fight to save tigers is being waged on many fronts. Leading the charge are three men whose mission is to understand tigers using science. The challenge these biological detectives face is enormous: over the last century tiger numbers have plummeted by 95%. D

11:00 pm 

Life On Fire  "The Surprise Salmon"  In Alaska, North America's highest mountains and most active volcanoes erupt and poison the rivers. Scientists are just beginning to piece together the events of nearly 2,000 years ago when one race of salmon faces the death of its river and is forced back to the open ocean - on an extraordinary adventure.G