I don't see this as black and white (life either happens or it doesn't at all). My pet theory is that there have been many places where life took root, in very

I don't see this as black and white (life either happens or it doesn't at all). My pet theory is that there have been many places where life took root, in very simple form, but failed to hit the "home run" like the Earth did, because the other factors stifled it.