Mouth-Peeing Turtle

There's something unusual about the Chinese soft-shelled turtle. Apparently it's "the only animal to urinate through its oral cavity." Put another way, it pees through its mouth. We know this thanks to Alex Yuen Kwong Ip of the National University of Singapore, who decided to attach tubes to the cloaca of these turtles. He discovered that only a small amount of urea was coming out that way. But when the turtles stuck their head in a bucket of water to take a drink, the urea concentration in the water increased dramatically. [New Scientist]