 Why does earth have a moon?
 There are many theories on why the Earth has a moon, but the most prevailing one is that the moon formed out of debris from a collision between ancient Earth and a Mars-sized body named Theia.
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<|USER|> Why does earth have a moon?
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 There are many theories on why the Earth has a moon, but the most prevailing one is that the moon formed out of debris from a collision between ancient Earth and a Mars-sized body named Theia.
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