I’m not sure of the path but suspect mammals came from sea creatures and maybe lizards were different? Reptiles are a different genus…I’m not sure of the terminology anymore but dinosaurs basically got wiped out by the ELE which is what I thought stopped them doing anything further…
You can google this pretty easily for your answer. Evolution is a scientific theory just like gravity. I have to shut this off because I think the implications aren’t wholesome for the forum.