Alyn Ware writes for InDepth News–

February 21, 2013

A meteor blasting into the atmosphere over Siberia (on February 15), injuring about 1000 people with debris, provided a graphic warning of the risk of a larger meteor, or even an asteroid, hitting earth. About the same time that the 10 ton meteor entered the earth’s atmosphere, an asteroid 15,000 times larger whizzed past planet earth. If the asteroid instead of the meteor had hit us, it could have wiped out civilization just as an asteroid hitting the earth 65 million years ago created climatic consequences that wiped out the dinosaurs.

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