10 surprising lunar facts

Published On: Jul 11 2014 12:43:27 PM EDT   Updated On: Aug 08 2014 07:42:58 AM EDT

Ahead of Sunday's "supermoon," check out 10 surprising facts about Earth's closest neighbor.

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Origins -- According to the leading theory, the moon was created when a rock the size of Mars slammed into Earth about 4.5 billion years ago.

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