Alberto Saal, Brown University (IMAGE)

Brown University

Alberto Saal, Brown University

Caption

Water deep inside the moon and water inside the Earth both came from the same source, according to research led by Alberto Saal, a geochemist at Brown University. The moon is thought to have formed after a giant impact to a still-forming Earth 4.5 million years ago. These new findings suggest that the moon's water may have been transplanted from Earth from that impact.

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Mike Cohea / Brown University

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