If something 50M years old is still visible on the surface, Mars has been a dead planet for a very long time. Probably forever.
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50M isn't that long in terms of how old the planets are.
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no one said otherwise!
End of conversation
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is that climate change
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How come all the other animals didn't become extinct?
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Coincidence? I think so.
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are you a News Channel or the History Channel? No wonder your rating suck.
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It's President Trumps fault.
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