[Bullet Magnet]

Average lifespan of a mammal species is three million years. I don't think modern humans are escaping that.

My fear is that we will, or already have, become too specialised to adapt further. A lot of species have died out that way. It's why the generalists never reign supreme, but continue to survive when others do not.

I also think that we should have higher aspirations for ourselves than sailing around the universe in sterile tin cans merely to survive. For example, we might learn to control our local environment in more positive ways. And if we learned to churn the sun, mix it's outer layers into the centre, we could increase its lifespan ten fold or more.