The world’s largest mass extinction triggered the switch to warmblood –… – AlKhaleej Today

Mammals and birds are warm blooded today, and this is often seen as the reason for their great success. Bristol University paleontologist Professor Mike Benton identifies himself in the journal Gondwana research that the ancestors of mammals and birds became warm-blooded about 250 million years ago at the same time as life was recovering from the greatest mass extinction of all time. The Permian Triassic mass extinction killed up to 95 percent of life, and the few survivors faced a turbulent wor…

Click here to view the original article.