Penguins love company — some colonies of the flightless bird boast numbers over 1 million. And with squads that can run that deep, you can be sure they make a mess of things, if you know what I mean. (Hint: I’m talking about poop.) But penguin waste isn’t just messy, it can be useful, too. Researchers have used it to help spot colonies in the past. Now, it seems that poop might be good for something else as well.

In a study out in Current Biology, researchers from Vrije Universiteit Amste