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 reaction<p>Anyone believe the Panspermia[0] theory?<p>> 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.<p>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).<p>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.<p>[0] <a href="https://en.wikipedia.org/wiki/Panspermia" rel="nofollow">https://en.wikipedia.org/wiki/Panspermia</a>