I am starting this thread because I have learned that many people know strange random facts. So if you know a random biology related fact, post it here. I'll start: Did you know that turtles can actually breathe through their butts? They can use this when they are head first in water so that oxygen can get into their blood. When they are, for instance, searching in small deposits of water looking for food, it would be very inconvenient to have to come up every few minutes to take in water since they move so slowly anyways. Because of this, some species of water turtles have actually adapted to breathe through their butts. A prime example is the Fitzroy River turtle (Rheodytes leukops) which can obtain as much as two-thirds of its oxygen supply through this route.