If you’ve ever refrained from relaxing your bladder while surfing for fear of attracting sharks, we have some good news for you. Former NASA scientist Mark Rober recently ventured into the Caribbean to douse some sharks with blood and urine and see how they reacted. Well, it was a little more scientific than that, but what he discovered could make surfers paddle a little easier.
Through a series of tests, he discovered that the sharks were less interested in small doses of blood than would be expected, and entirely uninterested in urine. So, next time you’re feeling a little chilly in that wetsuit, fire up that personal water heater and let loose.