How Do Chameleons Change Color?

New research shows chameleons actively tune nano-crystals to change their color.

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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 (LANE)