New research shows chameleons actively tune nano-crystals to change their color. For a 10-day free trial, check out ****** Chameleon research in Nature Communications: ****** "Photonic Crystals Cause Active Colour Change in Chameleons" This research was carried out by Jérémie Teyssier, Suzanne V. Saenko, Dirk van der Marel & Michel C. Milinkovitch at the University of Geneva Department of Quantum Matter Physics and the Laboratory of Artificial and Natural Evolution n (LANE) Original videos of chameleons are here: ****** ****** ****** ****** Additional details available at: ****** For correspondence: Michel C. Milinkovitch, Laboratory of Artificial & Natural Evolution (LANE), Dept. of Genetics & Evolution, University of Geneva, Switzerland. The melanin spreading out video is courtesy of Richard Wheeler: ****** ****** Special thanks to: Harry, Jo, Daniella and Raquel for helping me produce and film this video - it looks great thanks to you!