You’d probably notice if your poop is a different hue than normal. But what does it mean if it’s green? What about red, yellow, white, or black? Or orange? Most of the time, minor changes in ...

“It turned out that bee poop naturally fluoresces under ultraviolet light,” which made distinguishing between poo and non-poo remarkably easy, Giacomini recalls. “It was very dazzling—it ...