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Also objective:

As far as we know humans are the only species to leave Earth’s gravity well. No other species has been able to do that in 4 billion years.



Humans have not left Earth's gravity well. We've built probes that have, but humans have only gotten as far as orbit.


Did you forget about the Moon landings?


That's pretty close to escaping the Earth's gravity well, but not quite out, since the Moon is definitely still orbiting the Earth.




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