An optical illusion is a visual phenomenon where our perception of an image differs from objective reality. This image is perceived as a geometric optical illusion. These optical illusions occur due ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

The regular Short Wave science roundup covers mysterious red dots in space, the neurons behind optical illusions and a study of octopus arms. It's time now for our science news roundup from Short Wave ...