Re: List of african american inventions. Oh and to the IGNORANT FUCK that gave me some ridiculously illiterate negative karma-if you don't like my opinions, then come out and debate me in the open, don't hide behind anonymity.
Nevertheless, most scientists hold that the first organisms on Earth were much like bacteria of today. But several features of the biochemistry of life suggest that bacteria arenât so ancient after all. In fact, in some respects, the cells of our own bodies tell us more about the evolution of life than bacteria do.
Life on Earth first appeared as early as 4.28 billion years ago, soon after ocean formation 4.41 billion years ago, and not long after the formation of the Earth 4.54 billion years ago. Earth's current life may have descended from an RNA world, although RNA-based life may not have been the first. The mechanism by which life began on Earth is unknown, though many hypotheses have been formulated and are often based on the MillerâUrey experiment.