What if Dinosaurs Never went Extinct? + more videos |

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If dinosaurs never went extinct, then they would be much smaller today because during that time, angiosperms were beginning to take over from gymnosperms. Now, as compared to gymnosperms, angiosperms are easier to digest & require a much smaller gut size. Thus, size of herbivorous dinosaurs would have reduced and that would have gradually led to reduction in size of carnivorous dinosaurs as well.

Scientists also think that dinosaurs might have become more intelligent, because dinosaurs like Troodon, who were considered smart and had a large brain compared to their body size were beginning to evolve.

However note that, humans were able to evolve because the impact of the asteroid killed the dinosaurs, triggered drastic changes in climatic conditions, which led to mammalian evolution and eventually human evolution. Thus, had the asteroid never crashed, we probably wouldn't have existed.