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Moon's water may have earthly origins

Ratio of hydrogen to deuterium suggests a common source

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1:57pm, May 9, 2013

Water trapped deep within the moon’s interior came from the same source as water on Earth, a new study reveals. The research suggests that the moon seized a healthy supply of water from Earth when the satellite formed in the aftermath of a cataclysmic collision 4.5 billion years ago.

“This is an important result and a surprising result,” says David Stevenson, a planetary scientist at Caltech.

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