About earthquakes

Posted: 5:15 PM EDT May 17, 2011   Updated: 9:31 AM EDT Apr 11, 2012

Learn what causes earthquakes and look back at the biggest ones to ever rattle the U.S.


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13 health rules you can break

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Some health rules are followed religiously, but really have no medical or scientific foundation. Here are 13 popular rules that aren't as hard-and-fast as you might think.

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