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Originally posted by mitsur
Lets say a space rock(I can't spell the other word for it)hits.....lemme think.....Right in the middle of the US?From that day on,it sends burning heat to the surface.We may evolve to somthing that will not be bothered by the heat maybe.
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Asteroid?
It's far more likely that an asteroid hitting the Earth would cause cold rather than heat.
Yes, that is possible but it is more likely that humans will find a way to make their environments colder (currently) and it is possible that in the future genetic engineering could be used to make all new babies posess a trait which makes them less vunerable to the heat (or cold) and gene therapy could be used to apply that trait to the rest of the population.