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The greatest single achievement of nature to date was surely the invention of the molecule DNA.

Lewis Thomas
nature science achievement naturalism invention dna formation-of-dna origin-of-dna

All of today's DNA, strung through all the cells of the earth, is simply an extension and elaboration of [the] first molecule.

Lewis Thomas , in The Medusa and the Snail: More Notes of a Biology Watcher
evolution science biology origin-of-life dna origin-of-dna common-ancestor universal-common-ancestor first-cell first-molecule origin-of-the-first-cell origin-of-the-first-molecule