We spend a lot of time worrying about rogue comets... maybe our real fear should be that giant hunk of green cheese we see up there every night.
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no point worrying about any of it - if it happens there's nothing we can do about it anyway.
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Humans have existed for around 200,000 years. The time frame that you are talking about is many many times human existence. I don't think we have to worry much about it..
Actually the moon's orbit is increasing so eventually it will break away from Earths gravitational pull and drift off on its own.
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