Warning: This video contains footage of an octopus hiding under a coconut shell that it has carried around just in case it needed to hide from something. Watching this footage may contradict your previous assumptions about animal tool use, and may be too adorable for some viewers.
National Geographic: Octopuses Carry Coconut Shells as Instant Shelters
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.