New research shows that male sea lampreys (that's a sea lamprey mouth pictured above) entice females into reproduction with the help of a special bump of tissue. No, not that. Get your mind out of the gutter. The lamprey's "rope tissue" is fascinating, writes Science Codex, because it's made of heat-generating fat cells similar to the kind found on mammals that maintain their own internal body temps — something the lamprey can't do.
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.