In each of these mysterious images, a hidden meaning can be found. But which one?
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Dallenbach Figure

Dallenbach Figure

Created by Karl Dallenbach in 1952

What is this? Try not to look at the solution, it's much more fun when you find it yourself. It's something everybody knows.

Mysterious

Mysterious

You should recognize something in these spots. Really ! Keep trying and try not to cheat. This is one of the most famous "Guess what" pictures on the Web. You can't see the meaningless picture again once you know what it is. This indicates the importance of previous experience in your visual system. The picture was made by R. C. James featured in a book by R. L. Gregory, The Intelligent Eye.

What is this ?

What is this ?

Do you see anything meaningful in this picture ?

BBC Experiment 1

BBC Experiment 1

Created by Rupert Sheldrake in 1983

This picture was part of a TV experiment in 1983 with 2 million viewers. Sheldrake wanted to test his theory of morphogenetic fields. In this theory, the knowledge of other people can influence your own. In other words, if many people know what this picture is, you would also recognize it easier. The results were surprising ...

BBC Experiment 2

BBC Experiment 2

Created by Rupert Sheldrake in 1983

Second picture from the BBC experiment.

What is this ?

What is this ?

Fairly tough. Just try to see it without cheating.

What is this

What is this

I found this to be the most difficult of them all. Can you see what it is ?