THE GENIUS OF CHARLES DARWIN -- ILLUSTRATED SCREENPLAY & SCREENCAP GALLERY
on which Darwinian natural selection then adds.
And what's more,
genes can be compared with pinpoint precision.
The genes in every cell of every living thing are made up of DNA,
a code of the same four chemicals,
known as A, T, C, and G, which these machines can analyze.
Whether the cell builds a hamster, a horse, or a human
simply depends on the order of the letters in the code.