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 ...

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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 ...

Ever wondered why some people are so proficient at solving riddles and brain teasers? The human mind functions optimally with challenges, and puzzles like this one not only provide entertainment but ...

SEATTLE, WASH.—September 15, 2025—An illusion is when we see and perceive an object that doesn’t match the sensory input that reaches our eyes. In the case of the image below, the sensory input is ...

As you scroll through this article, your brain is hard at work creating the mental world you live in. You probably have a seamless sense that you’re embedded in a world full of other people, objects, ...

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism that appears to change shape when... Optical illusions are a brain feature, not a bug. Here's ...

When it comes to optical illusions, sometimes our brains can be too smart for their own good, overanalysing visual information that often leads to mind-melting effects. Made to amaze and confuse, even ...