THE FIRST THING Ray Johnson brought out when we started on our crow hunt was a worn and battered cowbell. I stared at the noisy contraption, for the only Ohio crow hunting I’d done in Ray’s company ...

Crows have long been known for their clever tricks, but new research shows they may be even smarter than we thought. Scientists have discovered that crows can recognize geometric patterns—a skill once ...

Crows are able to look at a handful of four-sided shapes and correctly distinguish those that exhibit geometric regularity from those that don't, according to a provocative new study. It's the first ...

Math isn't just a human thing. All kinds of animals, from African grey parrots to chimpanzees, are thought to have some kind of mathematical ability, but it can be hard to test. Now, a new study finds ...