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See how a mission to search for water on the moon is exploring a big question on a small budget. 03:10
Leafcutter ants shift 40 tons of soil to make their subterranean home. 01:53
Full Program: In the frozen wilderness of Antarctica, where oceans ice over and just staying alive is an achievement, one creature has perfected the art of survival - the emperor penguin. 52:39
"The Pluto Files" host and author Neil degrasse Tyson discusses how, since age nine, he's known he wanted to be an astrophysicist. 02:31
The Nanjing acrobats are masters of balance. Learn some of the secret physics of balance. 02:36