About 65 million years ago, dinosaurs lumbered through forests. After they went extinct, things changed — and the effects are ...

Megafauna, though not dinosaur sized, had by then grown large ... “It just was a really niche, small thing,” Doughty said. “And so it just took this complete reset of the ecology of the ...

Skeleton shows Mixodectes pungens lived in trees and primarily ate leaves during the Paleocene epoch, highlighting its unique ...

Mixodectes pungens, a species of small mammal that inhabited western North America in the early Paleocene, was a mystery.