A magician reveals his visual tricks ...

Brainteasers are mental exercises meant to test your mental limits, thus they're more than just puzzles. There are many distinct types of brainteasers with varying degrees of difficulty. Brain teasers ...

Fascinating visual phenomena known as optical illusions cause our brains to interpret reality differently. They can cause us to misinterpret what we see or trick our visual system into perceiving ...

The magical art of Olivier Redon ...