Chameleons have some pretty amazing features. They have stretchy, sticky tongues. They also have skin that can change color.

Most recently, researchers discovered another remarkable feature. Some chameleons have bones that glow in the dark!

Many animals, like fireflies and jellyfish, can glow. But most rely on chemical reactions inside their bodies to produce light. Chameleons are the first animals known to have bones that glow in the dark.

David Prötzel is a researcher in Germany. He helped make the discovery. He thinks this glowing ability might help the creatures identify other members of the same species.