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10:00 pm
Inside Nature's Giants
"Big Cats"
Dissecting a lion and a tiger, scientists show how alike the two big cats are under the skin. Biologist Simon Watt comes face to face with a liger - a cross between a lion and a tiger. Unlike small cats, both lions and tigers roar and the team analyzes what enables them to make that sound.G
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11:00 pm
Leonardo's Dream Machines
Experts use Leonardo da Vinci s drawings to attempt to build a giant crossbow and flying machine, 500 years after he committed the ideas to paper. The two teams use materials found in Leonardo s time and overcome inclinations to apply modern techniques. Part 1 and 2 of 2G
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