Would it be possible for binary planets, or even a planet and it's moon, to simultaneously sustain life? I know the odds of a planet having life on it is very low, but for a planet that does (earth) would it's sister planet or moon be able to sustain life as well? Maybe if the bodies are the same and simply broke up, then they would both contain the same conditions (soil, weather, etc.), right? I don't know, I am just curious. Also, how do bodies get into a binary state?