simple question, but i know i probably left out a few scientific reasons, so post them! :surprised
There is another possibility. (Maybe?)saltydog said:I don't think we'll make it. How so pessimistic that is and I'm usually so optimistic. You read stories about what man will do in the distant future, you know, like when the sun becomes a red-giant. Are they kidding? There won't be any humans around when that happens. We're all a part of one grand genetic lineage that ebbs and flows like a wondering river. We'll take our place for a moment and the next act will follow.
Some catastrophe will wipe us out, an extinction like so many before us. We solve differential equations in here about population growth and note that when the population drops to a certain level, it does not rebound but rather tends to extinction. So if such a catastrophe does occur and fails to wipe us all out, it may drop the number below a threshold that we cannot recover from.
Suppose though space exploration and colonization is an avenue for escape.