Scientists have discovered that peacock tail feathers can emit real laser beams, yes, actual yellow-green laser light.

Using a special dye and pulses of light, researchers found that the peacock’s feathers act like natural laser cavities.

This is the first-ever example of a biolaser in the animal kingdom. The lasing effect comes from microscopic structures in the feather’s colorful eyespots, though the exact light-emitting mechanism remains unknown.

The findings could inspire new research in bio-optics and even medical detection, where similar laser properties might help spot viruses or foreign structures.