We are all planets. Is it possible for intelligent life to escape destruction, be it from the planet or from ourselves? Or are we destined for extinction like 99% of all species before us? Our best chance of survival may be to escape from the land an... (more)d build another colony elsewhere. But there are real barriers: space radiation, microgravity and bacteria within us will conspire against us. And our DNA is encoded for the conditions here on earth, so if we ever manage to colonize another planet, those that are born there will evolve into another species.