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.

The optical illusion inside butterfly wings is similar to the barber-pole illusion. When looking at the red-and-white striped ...

A bizarre trick of the eye creating the illusion of an impossibly tiny waist on a Paris Olympics swimmer went viral, the second moment of the games that made viewers at home do a double-take. A video ...

Justin Peters uses Photoshop to create amazing digital collages and optical illusions that will make you do a double-take, ...

This question was posed as part of New Scientist’s Last Word series, in which readers give scientific answers to each other’s questions. Here’s what our readers had to say ...

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 ...

Your group chat probably has its own resident psychologist – the friend who insists a single picture on TikTok can explain ...

A bird attacking a butterfly will often find its beak snapping at thin air. According to new research, that split-second miss ...

It’s like putting on ugly goggles. Puzzle lovers are getting the heebie-jeebies over this “freaky optical illusion,” which makes people’s faces look hideously distorted. A now-viral video detailing ...

Optical illusion personality tests are interesting brain teasers that trick the brain and eyes into believing what a person ...