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Dinos Alive?
Dinosaurs became extinct 65 million years ago by many possible theories. One theroy is that an asteroid crashed into earth and caused a major climate change and lots of smoke, dust, etc, was raised into the air and blocked out the sun. There are other theroies too.
First answer by ID1204414666. Last edit by Dragon whisperer. Contributor trust: 28 [recommend contributor]. Question popularity: 4 [recommend question]
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Answers.com > Wiki Answers > Categories > Animal Life > Prehistoric Animals > Dinosaurs > How long have the dinosaurs been extinct?
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