Ingenious chemistry shows how nucleotides may have formed in the primordial soup.
“It is often said that all the conditions for the first production of a living organism are present, which could ever have been present. But if (and Oh! what a big if!) we could conceive in some warm little pond, with all sorts of ammonia and phosphoric salts, light, heat, electricity, etc., present, that a protein compound was chemically formed ready to undergo still more complex changes, at the present day such matter would be instantly devoured or absorbed, which would not have been the case before living creatures were formed.”
-- Charles Darwin (letter written in 1871 to botanist Joseph Hooker)
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