Chapter 9 - After the Dinosaurs/The Paleogene

Hey, look!  There is a Cimolestes!  One of Earth's first mammals.  It lived long, long ago.  Like mammals today, they had fur.  Most gave birth to live babies and fed them milk.  The first mammals were small, like Cimolestes, and lived amongst giant dinosaurs, which sounds like it would be easy, because who would imagine a Tyrannosaur going after a tiny little rat mammal instead of a giant, juicy triceratops?

While Cimolestes was first found in fossilized remains from the late Cretaceous, many scientists believe it survived into the Paleocene, beyond the extinction of the last dinosaurs.

Also, here is Alphadon, another early mammal that evolved after the dinosaurs went extinct.