At first glance, this beautiful blue-toned illustration looks like nothing more than a decorative window opening into a surreal cosmic background. But take a closer look: which way is the window ...

Allen Institute researcher Jerome Lecoq points to one of the diagrams that was used in a study focusing on how the brain interprets optical illusions. (Allen Institute Photo / Erik Dinnel) Our brains ...

Most people take for granted which hand they use to reach for a cup of coffee or a puzzle piece. However, a new study out of ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception. By Katrina Miller Take a look at this video of a waiting ...

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism which appear to change shape when viewed from three different directions. Those are the top ...