Stephen Fry is taking part in a curious science experiment. It involves creating a portrait of the writer/comedian/science enthusiast, using nothing but his own bacteria and cells. According to the web site of The Big Bang UK Young Scientists & Engineers Fair, the “bacteriographs” -- as the portraits are called -- are "made from the subjects’ own cells – and have been grown by Zachary Copfer, an American microbiologist and photographer." "To make the Pop Art style images, Zachary cleverly exposes areas of a petri dish to radiation in order to stimulate the bacteria’s growth. This creates a photograph grown entirely from the bacteria itself." Find more of Copfer's work below, and other scientific work featuring Stephen Fry further down the page.