How Africans evolved a palette of skin tones.

Abstract

SCIENCE sciencemag.org images. In work from 1975 to 1986, Frank came up with a way to make sense of the data, by using algorithms to sort the images into related groups and then averaging each one. This not only sharpened the 2D images, but also allowed them to be combined into a 3D structure. In the early 1980s, Dubochet sharpened the resolution further by… (More)
DOI: 10.1126/science.358.6360.157