This handprint--which shows what an 8-year-old's hand looks like after playing outside--is the stuff of nightmares. Tasha Sturm, a microbiology lab technician at Cabrillo College, posted this picture on Microbe World after letting the handprint incubate in a petri dish for several days. The yeasts, fungi, and bacteria growing are likely harmless or even beneficial to a person's immunity, but that doesn't make it any less disgusting. Now, if you'll excuse us, we have to go wash our hands. Tasha Sturm