Why do scorpions glow under ultraviolet light?
Quick Answer
Scorpion exoskeletons contain compounds that fluoresce under UV light. This glow is caused by molecules in the cuticle, not by the scorpion producing light itself.
The Full Story
Many scorpions fluoresce bright blue-green when exposed to ultraviolet light, especially under a blacklight. The effect comes from substances in the outer cuticle, including compounds associated with the waxy layer, which emit visible light after absorbing UV radiation. Scientists still debate the exact evolutionary function, but possibilities include helping scorpions detect moonlight levels or providing protection from intense light. The fluorescence has become a popular way to find scorpions at night for ecological surveys. It is an excellent example of a natural property that looks like glowing but is actually fluorescence.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Shine a blacklight and scorpions suddenly light up the dark."