Today’s optical illusion challenge is all about testing your observation skills. At first glance, the image looks simple.

ONLY 15% of of millennials can spot the correct hidden image in this blurred optical illusion – but can you do it in less ...

This fun optical illusion tests your ability to focus! The cluster of related numbers conceals a number. Within 5 seconds, identify the concealed number among these number. You have only 5 seconds to ...

Challenge your brain with this tricky optical illusion! Test your IQ, observation, and problem-solving skills by finding how ...

Test your observation skills with this brain-teasing optical illusion! Two seemingly identical pictures of a family BBQ hide ...

Spot all the hidden faces in this waterfall optical illusion. A fun visual challenge to test your observation skills, sharpen ...

This amusing optical illusion tests your ability to concentrate! The cluster of related words conceals a word. Task: Within 3 ...

However, hidden within this vibrant image is a small candle, cleverly camouflaged among the details. The illustration bears ...

Redditors responded with mixed reactions — some successfully spotting the cat’s hiding place, while others admitted defeat ...

Optical illusions, like finding a hidden bee in a cozy room scene, are more than just fun. They activate brain regions ...

An optical illusion has been circulating online that claims to be able to tell you something about your personality based on ...

When the new book Champions of Illusion: The Science Behind Mind-Boggling Images and Mystifying Brain Puzzles arrived at the Mental Floss offices, we couldn't flip through it—and flip our brains ...