Contact: Kevin Stacey
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.
Credit: Mike Cohea / Brown University
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Related news release: Water on moon, Earth have a common source