Optical illusions play tricks on your brain and can make you see things that aren't really there, from static images swirling around the page to images that stay with you even after you look away.

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. In Head Trip, PopSci explores the relationship between our brains ...

Polystable illusions have been of interest to psychologists for a long time. Polystable illusions are typically still or moving images that observers may experience as having more than one ...