Scorpions glow green in ultraviolet light.
My first reaction was “why?” But, why not? Our eyes can only detect a tiny sliver of the EMF spectrum. What if our eyes could detect a different part of that spectrum? Its only a change to the frequency sensitivity. UV is right next door so it’s a minor shift. Maybe some animals did evolve this ability.
But what if we could see radio waves or x-rays or gamma rays, all of which exist in nature? (at Kings Camp Lodge)