4ce34719-dc97-4f55-9445-10c84fc5770e
prompter
Why does earth have a moon?
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4ce34719-dc97-4f55-9445-10c84fc5770e
assistant
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.