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Why Wasn't There A Second Age of Reptiles?
Season 7
Episode 15
An asteroid impact triggered the K-Pg mass extinction, wiping out the non-avian dinosaurs, ending the Age of Reptiles, and ushering in the Age of Mammals. But why was it the mammals who triumphed?
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12:28
Learn about the complicated the history of mammals and their disappearance.
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8:04
Learn about how researchers have discovered a piece of a weird, but critical, time in the deep past…