Soh Kam Yung commented on Beasts Before Us by Elsa Panciroli
For most of us, the story of mammal evolution starts after the asteroid impact that …
Chapter four looks at the Permian period. It is during this time that the synapsids began to get big, with animals like the well known Dimetrodon and others. Various explanations are provided for that animal's sail on its back. But it was also during this period that herbivores (plant eating animals) first developed.