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Re:How are humans going to become extinct? by yen223 on Wednesday April 24, 2013 @06:18AM (#5600699)
Energy is possibly the biggest barrier towards future space colonization. It is entirely possible that we discover some new source of energy that allows us to:

1. Send a sustainable human population out of the solar system;

2. Travel to an inhabitable planet which may be millions of light-years away;

3. Geo-engineer that planet to the extent that it can self-sustain a moderate human population.

None of these steps is trivial. The pessimistic side of me thinks that we may actually never overcome any of these challenges.

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