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Re^2: Extraterrestrials haven't visited the Earth yet because:by Arunbear (Prior) |
| on Sep 19, 2016 at 10:49 UTC ( [id://1172118]=note: print w/replies, xml ) | Need Help?? |
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Not exactly. #2 is meant to cover the case where there is extraterrestrial life, but it never evolves to a human level of intelligence (or higher). i.e. we don't know if the emergence of life inevitably leads to technological capability.
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