The extinct mammals were about five times larger than a grizzly bear–and filled caves with their poop.

Before the Spanish introduced modern horses to the New World, horses roamed wild in North America, then they disappeared, but ...

Molecular clues from collagen in old bones are teaching us about the lives, movements, and demise of Ice Age megafauna like mammoths.

Massive Megatherium sloths once stood as large as Asian elephants, ripping foliage off treetops with prehensile tongues like ...

A new report co-authored by a Canadian researcher warns that more than one-fifth of pollinator species it studied in North America are at risk of extinction. Enjoy the latest local, national and ...