You'd expect public bathrooms to be pretty gross, especially in and around the toilet. By the time people have washed their hands and headed towards the dryers, however, you'd hope that most of people's gross bacteria would have been washed away down the drain. Right? Nichole Ward, a student from Carlsbad, California, decided to test that for her microbiology class. She collected bacteria from a dryer by placing an open petri dish inside it for three minutes, and then incubated the bacteria collected. She posted the results of the experiment to Facebook, and made the post public after her grossed-out friends demanded she alerted the world. The post went viral because, well, the image of the petri dish is really, really gross. "Ok guys.. ready to have your mind blown?!" the student wrote on Facebook. "This here, is what grew in a petri dish after just a few days. I stuck the open plate in a Dyson hand dryer of a public bathroom for a total of three minutes. Yes, three only. DO NOT EVER dry your hands in those things again." Pretty grim, no? People were rather alarmed by the experiment. Source