World’s greatest mass extinction triggered switch to warm-bloodedness — ScienceDaily
Mammals and birds today are warm-blooded, and this is often taken as the reason for their great success. University of Bristol palaeontologist Professor Mike Benton, identifies in the journal Gondwana Research that the ancestors of both mammals and birds became warm-blooded at the same time, some 250 million years ago, in the time when life […]
World’s greatest mass extinction triggered switch to warm-bloodedness
Posture shift at the end of the Permian, 252 million years ago. Before the crisis, most reptiles had sprawling posture; afterwards they walked upright. This may have been the first sign of a new pace of life in the Triassic. Credit: animal drawings by Jim Robins, University of Bristol. Mammals and birds today are warm-blooded, […]
