Was there a spark that created life on earth. The truth of the
matter is probably more mundane. But the real breakthrough
was probably the appearance of a cell(s) ie something structured
with an inside and an outside, which needed to replicate and
eventually repair itself, in effect eat and get rid of garabage.
But my understanding is that all took a terribly long time, with many
reversals along the way. From the minute molecular structure to the
notion of cell we know today.
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An interesting piece on one of my favorite foods, lettuce:
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