Before the Dinosaurs were around on Earth, the dominant group of Animals that roamed the earth were the Permian Synapsids. They were bizarre looking mamal like reptiles. Some of them had spines on their back.
If you saw a Permian Synapsid, you would see a creature that looks both like reptile and a mamal at the same time.
It is thought they went extinct because of frivalous volcanism, or several super volcanoes erupting in tandem. The food chain was wipe out by acid rain and cold weather because of dust from the volcanoes.
Read more..
Alan's Public Diary Journal of everything.
