In the above image, it is a black-and-white star gradient halftone optical illusion, and even 99% can't spot the hidden ...

While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

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 ...

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 ...

An optical illusion has left viewers absolutely stunned as it tricks their minds into perceiving a black and white image in vivid colour - but only if you carry out one crucial step. Posting the ...

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...

A viral optical illusion is said to reveal the viewer’s strongest personality traits including whether they’re too independent or have a strong intuition. The visual psychological test is one of many ...

It’s a visual personality test. Viewers are frazzling their puzzlers over this multifaceted optical illusion, which reportedly reveals certain personality traits based on what they see first. A video ...

Astronomers just found another case of something out there bigger than a supermassive black hole: ultramassive black holes, which are the true behemoths of the Universe, clocking in at over 10 billion ...

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 ...