How mammals became mammals?

Synapsids are one of the two major clades of vertebrate animals that evolved from basal amniotes (a group of tetrapod vertebrates), the other being the diapsids, which include reptiles and birds. What distinguished them from diapsids was development of a single temporal opening on the side of the skull. Around 280 million years ago climate started to change which caused many groups of primitive reptilian and amphibians to rapidly decline. Aynapsids instead adapted to the new conditions and dominated the earth. Over time synapsids evolved into many different forms from carnivores to herbivores. At the end of the permian period took place the biggest mass extinction in history of our planet. After that synapsids that didn't extinct started competing with reptails. Dinosaurs quickly replaced them and only smaller ones which adapted to the new environment survived. They endured the cretaceous extinction which killed dinosaurs. New mammals filled many different ecological niches and spread across earth evolving into many species including humans.



sources: https://www.youtube.com/watch?v=g7Ew8nrxi84

https://en.wikipedia.org/wiki/Synapsid

https://www.google.com/search?sca_esv=571613202&sxsrf=AM9HkKk8b3I2FbVTG8JZdstbDSgsoOCLJA:1696710484188&q=synapsids&tbm=isch&source=lnms&sa=X&ved=2ahUKEwjSi8mN4-SBAxVIKBAIHaXrC6EQ0pQJegQIDhAB&biw=1745&bih=839&dpr=1.1#imgrc=TEJ0RVy8D5hqIM&imgdii=G7LTLOby54nI5M

https://www.google.com/search?q=dimetrodon&tbm=isch&ved=2ahUKEwjQ_K_W5OSBAxV-KxAIHcf7DSQQ2-cCegQIABAA&oq=dim&gs_lcp=CgNpbWcQARgAMgQIIxAnMgUIABCABDIICAAQgAQQsQMyBQgAEIAEMgUIABCABDIFCAAQgAQyBQgAEIAEMgUIABCABDIFCAAQgAQyBQgAEIAEOgYIABAHEB46BwgAEIoFEEM6CAgAELEDEIMBOgQIABADULIKWM4NYJwXaABwAHgAgAE_iAHyAZIBATSYAQCgAQGqAQtnd3Mtd2l6LWltZ8ABAQ&sclient=img&ei=-cAhZZCcEv7WwPAPx_e3oAI&bih=839&biw=1745#imgrc=LvYioDRIYjBbLM&imgdii=qu_xgzNkW-wy5M

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