How good is your mental speed at observing hidden details? Solve this optical illusion to find out! Only if you are visually ...

From the Rorschach inkblots to the famous 'duck–rabbit', scientists use an arsenal of so–called ambiguous images to help probe the human mind. Now, researchers have revealed four new pictures which ...

Optical illusions thrive online because they play tricks on human perception. The brain often relies on familiar patterns and ...

An optical illusion is a visual phenomenon where the brain misinterprets what the eyes perceive, creating a false or misleading impression of reality. This happens because the brain processes visual ...

Look closely at this picture. At first glance, you can see a big tortoise in the centre of the image. But look closer, and you will see multiple small tortoises camouflaged in the surroundings. Your ...