Hogfish are the chameleons of the Atlantic Ocean, seamlessly changing their skin color depending on their environment. As if those morphing skills weren't impressive enough, these reef dwellers can ...

This story appears in the September 2015 issue of National Geographic magazine. For sheer breadth of freakish anatomical features, the chameleon has few rivals. A tongue far longer than its body, ...

Color change in animals is a response shaped by evolution. Each species has developed its own method and reason for this ability, like an overreliance on light or temperature cues, or a physiological ...