Meteorites help date the violent birth of Earth's moon

April 20, 2015 3:40 PM

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Meteorites help date the violent birth of Earth's moon

Earth's moon probably formed during a cataclysmic impact between Earth and a Mars-size object that scientists call Theia. A study of meteorites suggests that this collision may have occurred 4.47 billion years ago, scientists say. (NASA)

This still image from an computer simulation shows how the Earth's moon formed in the aftermath of a collision between Earth and a Mars-size object. (Southwest Research Institute)

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