It comes from Death's sickle, prunning the random noise introduced by mutations to generate useful information. Natural selection. There's a paper where people

It comes from Death's sickle, prunning the random noise introduced by mutations to generate useful information. Natural selection. There's a paper where people put bounds in terms of bits/generation a species can acquire over time. Apparently sex developed as a workaround life found to inclease this bandwidth from about 1 bit/generation to much larger values: http://www.inference.org.uk/mackay/gene.pdf http://www.inference.org.uk/mackay/gene.pdf