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Name: david a hart
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Date: 1993 - 1999

Will Earth ever be hit by a giant asteroid or several?

How often the Earth is hit depends on the size of the asteroid or meteor. One as large as the one that took out the dinosaurs 65 million years ago probably only hits the Earth every few hundred million years. Astronomers are trying to identify all the Earth-orbit-crossing asteroids, so that in the future we might have enough warning before one hits that we can do something about it. Currently, only about 1% have been identified.


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