Optical illusions occur naturally in different habitats and conditions across the world. Cloud formations can sometimes make it seem like there's an ocean or a UFO in the sky. Whether it is salt flats ...

Your brain is lying to you right now. Not maliciously, and not because something’s wrong with it. It’s doing exactly what evolution designed it to do, making split-second decisions about the world ...

Have you ever looked at two circles of exactly the same size and sworn one was larger? If so, your eyes have been tricked by the Ebbinghaus illusion, a classic example of how context can shape what we ...

Chances are you’ve encountered some version of the “Ebbinghaus illusion,” in which a central circle appears to be smaller when encircled by larger circles and seems larger when surrounded by smaller ...

Guppies are highly susceptible to the Ebbinghaus illusion. Ring doves? Not so much. For instance, guppies and ring doves diverged hundreds of millions of years ago and hence are phylogenetically ...