Damselfish can recognize members of their own species by their unique facial patterns, detectable to us only under ultraviolet light. The fish were tested under conditions where they were rewarded for swimming toward an image of a fish-face they had seen before over a novel image. They overwhelmingly picked familiar faces. Since fish swim in groups, it may benefit them to know their neighbors.
Also, the title of the article should be "Not just a human skill!" - as it is surprisingly not a human skill...
Every Friday (more or less), sharing some of my favorite news stories of the week!
What are dog farts made of?
Wherein scientists put fart suits on dogs in order to determine the chemical composition and stinkiness of dog farts. What I'd like to know is: what makes some dogs more "fart-prone" in the first place? How did they choose subjects for the study? ("Wanted: Highly Flatulent Dogs")? Read all about it here: