Researchers shot lasers into brain cells and triggered illusions on demand—a breakthrough that’s rewriting how we see the ...

Test your IQ and vision with this Black-and-White Checkered Spiral Optical Illusion. Only 1% can spot the hidden animal in ...

The featured vintage image portrays a cozy living room where a family is enjoying some leisure time. A man reads a newspaper, ...

A new study finds that people hear familiar words as louder than nonsense words, even when both are equally loud. The results ...

A new optical illusion is here, and it is a lot trickier than it looks. The image has a grid of 14 columns and 9 rows. The ...

At first glance, you can see a grid full of numbers 78. But there is one exception. The exception is the number 87, and the challenge for you is to find the number 87 in 7 seconds to win this puzzle ...

Purple is a nonspectral color made by the brain, showing how individual differences in vision shape the colors we see.

This optical illusion dares you to spot all the hidden faces in just five seconds. Look closely, the answer reveals far more ...

An optical illusion showed trees hiding an owl. Users tested their eyesight and debated online after struggling to spot the ...

A supposedly 3D optical illusion has been posted online and is possibly the most divisive I've ever seen on the optical ...

This viral optical illusion hides an inverted 55 and a 53 among dozens of 35s. Can you spot them before time runs out, or ...