It's the Civil War and you're in the medical tent. In the darkness the man next to you has wounds glowing an eerie blue. Turns out, the men who had the glow were more likely to survive. The curious reason for Angel's Glow won two high school students an international science award in 2001. It's so gross. Your inner twelve-year-old will love it.

The Battle of Shiloh 1862 & nematodes with bioluminescent bacteria inside. image: from All That's Interesting