Four billion years ago, life has started to appear in the Earth's primordial waters. Our ancestors didn't grow, not complicated and even multicellular. What scientists know are her ancestors, only a single-celled prokaryotes.I have known "Genealogy" of every species on this earth, but the understanding of all living ancestors is still very limited. LUCA, the abbreviation for the ancestors of common space in the end (the last universal common ancestor) didn't leave a bit of evidence about his work ever existed. Actually, what's left of LUCA is only the trace is faint lies in genomes of all living things.
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