i will give you my theory, they are many super advanced civilizations in the universe one is the leader, but one has enough that she must obey all the time the leader so she traveled billions of light years where they found earth where the dinosaurs are the most dominant species and they see that they are not intelligent species, so they decided to wipe them out,to create other beings(us humans) to evolve into the most intelligent beings in the universe and they have plan how to control the universe with us, and right now they are waiting us to evolve.and they could have directed the meteor that killed the dinosaurs.
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