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These Creatures Were Darwin's Greatest Enemy
Season 5
Episode 9
They may not look like much, but beneath that shell lies an evolutionary mystery - one that stumped the biggest names in natural history for over a hundred years.
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11:25
What did life look like when the Amazon watershed flowed backwards?
12:10
Did you know the evolution of the butthole was a major breakthrough in animal development?
12:28
Learn about the complicated the history of mammals and their disappearance.
10:50
Where did our moon come from? The origin is even stranger than you may imagine.
9:45
How did the "false horse," Thoatherium, and its relatives survive?
10:21
Did you know volcanoes created the Atlantic Ocean that we know today?
8:04
Learn about how researchers have discovered a piece of a weird, but critical, time in the deep past…
