Earth and Moon Share Water Source

Water on the moon came from the same source thought to have supplied most of the water on Earth, according to new research published in the journal Science. The common origin offers new insights into how planets formed and evolved.

Scientists have long believed our Moon was formed when a Mars-size planet collided with the Earth 4.5 billion years ago and jettisoned a disk of molten debris into space. The cataclysm would have generated enough heat on the newborn Moon to burn off the elements …

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