Optical illusions forwarded in emails usually don't get much of a response out of me, but for some reason, this one really amazed me. Enjoy!

Follow the movement of the rotating pink dot. The dots will remain only one color, pink.



Now, stare at the black " + " in the center. The moving dot turns to green.

Now, concentrate on the black " + " in the center of the picture. After a short period, all the pink dots will slowly disappear, and you will only see only a single green dot rotating.

It's amazing how our brain works. There really is no green dot, and the pink ones don't really disappear. This should be proof enough; we don't always see what we think we see.