Were the dinosaurs cold-blooded, like all extant reptiles? Or were they warmblooded? This question is the object of a lively

The disappearance of the dinosaurs 65 million years ago has become one of the most gripping scientific whodunits of all

Millennia of sustained drought and wintry cold ushered in the great Permian crisis. The luxuriant Carboniferous forests of ferns and