Illusions like these mess with the brain's visual processing system, making viewers see things that aren't there in reality. | Credit: Eva Almqvist via Getty Images Optical illusions play tricks on ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and were seen in caves. Nowadays they are found all over the place – on screens, in books and even in ...

Add Yahoo as a preferred source to see more of our stories on Google. The Vienna team stitched together slices of light to create snapshots. At rest (left), the cube looks normal. But when simulated ...

Exhibition at the Hirshhorn Museum and Sculpture Garden 2008. Published in association with the Hirshhorn Museum and Sculpture Garden. This volume offers an in-depth exploration of contemporary moving ...