So we agree "There is life on this planet". Can we also agree that the planet existed before there was life on it?
You're on a roll. Yes the planet preceded life. Almost as deep as your first Enunciation.
If so there are only two possible options for life to appear: it came from elsewhere (which only begs the question of how it came to be there) or it was came to be here from non-living materials, in other words, abiogenesis. I doubt the former so it must have been the later. (sic) Too deep?
A little learning is a dangerous thing. Drink deeply or taste not the Perian Spring. - Alexander Pope
The Miller-Urey Experiment famously suggested what you are leading up to. The trouble is that the Miller-Urey Experiment was flawed from the beginning. Moreover, it was in a carefully controlled laboratory, with flasks and equipment set up by a PhD and his student. They made erroneous assumptions in the process of synthesizing two or three simple amino acids, in extremely small and utterly useless quantities which constituted racemic mixtures, not the L-isomers we find in our own bodies. Other than that, spell "latter" correctly. "Too deep?"
