Grab your glasses for this one, because we’re talking animal eyes. Eyesight is one of the most important adaptations animals rely on for survival. As humans, we know how much we depend on our eyesight ...

How do animals see the world differently than humans? In this video, we’ll show you how dogs, cats, sharks, snakes, horses, lizards, fish, and even pigeons perceive their surroundings. You’ll be ...

The famous Ebbinghaus illusion, named for its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909). Despite appearances, the two orange circles are the same size. Have you ever looked at ...