Scientists identify substance that may have sparked life on earth
> We believe the change was sparked by a few small precursor proteins that performed key steps in an ancient metabolic reactionAnyone believe the Panspermia[0] theory?> Panspermia proposes that organisms such as bacteria, complete with their DNA, could be transported by means such as comets through space to planets including Earth.For all we know there could have been an Earth-like planet that had life in the early solar system, and they got destroyed by large impacts, and some of that life rained down on Earth (in a simple form).There is also the theory that life propagated from distant star systems that harbored life (or still do) and had enough time to spread to Earth.[0] https://en.wikipedia.org/wiki/Panspermia