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This is Scientific American's 60-Second Space. I'm Karen Hopkin. Got a minute?

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It's sad but true: the moon is not made of cheese.

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But it still holds some fascinating surprises.

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Because a recent study finds that the moon harbors more water than was previously thought,

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and that this lunar H2O appears to hail from the same source as the water on Earth.

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That's according to work published online, in the journal Science Express.

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The moon is thought to have formed by a violent collision between a spacefaring rocky body and the proto-planet Earth.

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It was also assumed that the heat of this impact would have caused any water,

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or its constituent elements, to boil off into space, leaving the baby moon high and dry.

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But recent studies have found that samples of volcanic glass, brought back from the moon on the Apollo missions, contain as much water as magma found here on Earth.

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Now, by examining the isotopic composition of that water, researchers have found that it matches that of meteorites, the likes of which also delivered Earth its first drink.

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The simplest explanation is that our planet was all wet before the impact that gave rise to its satellite.

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Next mystery to unravel: how did the moon manage to maintain that moisture?

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Thanks for the minute, for Scientific American's 60-Second Space. I'm Karen Hopkin.

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