Most of you probably already know the optical illusion pictured above. The fields marked A and B look different, but in reality the two colors are identical. At the end of the article is an proving picture for the unbelievers. :) Knowing this illusion, do you also know how it works?

» read on!

(This article is also available in German)

Human perception is a fascinating thing to fool around with. There are numerous illusions which make you see things that are not really there (without using hallucinogenic drugs).

One of the most intriguing optical illusions is the colourful black and white image.

» read on!