Biologists at Arizona State University have discovered that veiled chameleons (Chamaeleo calyptratus) change colors in unusual ways when they interact with other chameleons. The veiled chameleon, Chamaeleo calyptratus. Image credit: Russell Ligon. In their study, Dr Russell Ligon and Dr Kevin McGraw used photographic and mathematical modeling tools to learn how the color change of veiled chameleons relates to aggressive behavior. They studied the...