Optical illusions have long fascinated people, offering a unique way to challenge the brain while providing an element of fun ...

A calm chameleon, for example, may exhibit green, because the somewhat contracted yellow cells allow blue-reflected light to pass through. An angry chameleon may exhibit yellow, because the yellow ...

The Meller's chameleon is the largest of the chameleons ... Their normal appearance is deep green with yellow stripes and random black spots. Females are slightly smaller, but are otherwise ...

It takes up to 30 days for the chameleon shrimp to turn the same color as the algae. The researchers observed that the color change from red to green is faster than the other way around.