A sixth-century "mini" ice age may have been "the straw that broke the camel's back" that led to the final disintegration of the Western Roman Empire, a new study claims. Between A.D. 536 and 547, ...

A saber-toothed squirrel-like mammal from the Age of Dinosaurs is shedding light on just how diverse our distant ancestors might have been, researchers said. With its superlong fangs, long snout and ...