I'm a nerd, a geek, and a science buff. I've heard of it, but never tried it until recently. I bought an inexpensive portable black light (talking $5 at Walmart...check for clearance after Halloween). I went out in the back property, flipped over some rocks, shined my black light on those little buggers and...totally flipping awesome. Those little frakers fluoresce under a black light. They glow this eerie wicked-looking green color. I'm not sure, but logic dictates that it's the phosphorus in their shells. Phosphorus is what is in those glow-in-the-dark-stars . Am I the only sex-crazed science geek out there or has anyone else tried this?