[pharke]

I don't think we will remain as is but I also don't think we will never leave the solar system. Everyone seems to miss the next great technological advance that's currently under way. Biology as a practical science is still in its infancy. We haven't yet learned to fully control the cell and its many forms and functions but I don't doubt that we will given enough time. Once we do, there is no reason we could not adapt fully to space travel.