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What if The Dinosaurs Didn't Go Extinct

66 million years ago, a giant asteroid hit the Earth and wiped out the dinosaurs. What if it had missed? Would a highly intelligent species like Homo sapiens still have evolved— or would evolution have gone off in a completely different direction? Another 66 million years of dinosaurs may have failed to produce intelligent tool users because dinosaurs and mammals had different evolutionary constraints and pathways open to them. But it's also possible that the asteroid impact pushed evolution in a fundamentally new direction, altering the selective pressure operating on species, and favoring the evolution of intelligence. Even so, it may be a fluke that we're here.