Our collection of links to good science writing is up on Nobel Intent, part of Ars Technica. Follow the link to Tangled Bank 106.
Hmm, this looks interesting:
Darwin’s tomatoes, incidentally, show that a single base change in regulatory DNA can radically alter an organism’s morphology. The Tangled Up in Blue Guy then tracks what happens as such mutations spread within a population in an easy-to-follow discourse on population genetics.