Why did dinosaurs extinct? Some geologists had got the solution of this puzzle. Their said it was due to the eruption, and causes the climate change. Dinosaurs and reptiles would either burn to death or have lack of oxygen in the air, since the smoke would be more concentrated int he air. So that's why no one can escape the extinction.
However, the physics had objected that idea. They said the culprit is the comet. Issac Newton had proved that the earth has the gravity that would pull everything near it. This is why the comet was crashing to the Earth, due to the size of that comet, the speed would then multiply and become faster. Thus, having reaction with the oxygen, so with the chains of effect, it crashes to the Earth, eventually wiped out the existence of the dinosaurs.
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改错：*they said it was due to
改错：the physicists had objected that
改错：While having reaction with oxygen, it created the big fire. Thus the chains of effect would eventually wiped the existence of the dinosaurs away.
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