These four faces were generated by an IdentiKit operator at the request of a scientist. IdentiKit is a standard software used by the police to produce face composites of criminals. The individuals depicted here are all famous celebrities. If you think you know them (or one of them) you can participate in the weird experiments photofit challenge and win The Mad Science Book. I will reveal the names as well as the source and the surprising results of photofit experiments by the end of next week. Send your solutions to firstname.lastname@example.org.