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whallett
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BEST ANSWER  chosen by asker   |  whallett  |  December 21, 2008 03:35 PM
It is really an unanswerable question. History shows that population expansion and contractions happen all the time (geologically speaking), and it is possible that a new disease, a great war, or a major natural disaster could cause such a huge human population contraction that there would be no need to expand into space. Dr. Hawking's quote was overly simplified to be "expand" or "extinct" but the most likely answer is something in the middle.
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Thank you both for your thoughtful answers. I chose this answer partly because it had a research source included. Thanks again!

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seyonwerdn...
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seyonwerdna  |  December 23, 2008 05:54 AM
The human race will be just as likely to become extinct, if not more likely, in space. Earth is the most hospitable environment known to man. Life has thrived here for millions and millions of years, and the odds that mankind will be wiped out within the next thousand years are slim, in earth or in space. Overpopulation will not be a problem, because the more humans there are, the more likely the human race is to survive. The increased population will be more than able to absorb any increase in death rate do to overpopulation.
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