Even though it is suggested that life was brought to Earth by some heveanly body it is still a theasis to be confirmed by some distatnt exploration, maybe even on Mars. However, until we find an “uninteligent” life outside of our planet it is all a bla, bla and plain old guess. What we know about life is that life maintains it and it needs to be fed by life and human has brought this “feeding” to a new level, when you compare it with other lifeforms on our planet, with whoom finally we share so much. And every story which I found until know is speaking about the alien race which would come and enslave us, eat us or whatever, but we are the ones which are finally doing that. Life itself maybe is not much different to look at as the moss…if the conditions are right it will probably bloom, but the primary creation of life remains a mistery. Not only that we do not know where are we coming from, we do not know how we bacame to be.