How did mammals lose power to dinosaurs?
The mammals that were around before the dinosaurs probably died out as a result of a major change in climate as the earth got warmer. This time was a period when more than 70-90% of all living species went extinct because they couldn’t adapt as fast as the climate was changing. The dinosaurs took about 20 million years to take over from the mammal-like reptiles, from about 220 million years ago to 200 million years for the transition to be complete and for dinosaurs to rule the earth!
