After the dinosaurs went extinct, why did they not return over time through evolution?

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I never learned much about evolution, so please do explain it like I’m 5

In: Biology

35 Answers

Anonymous 0 Comments

Lots of answers for evolution already, but do you know why everything was BIG? There was way more oxygen on earth due to way more plants. More oxygen allows for creatures to grow larger. That’s why there were giant bugs flying all around. Giant bugs can make good food for giant dinosaurs. 

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