ADN

Check this out...Focus on the dot and move your head back and forth...

Is this possible..?

This picture is not animated. Your eyes are making it move. To test this, stare at one spot for a couple seconds and everything will stop moving. Or look at the black center of each circle and it will stop moving. But move your eyes to the next black center and the previous will move after you take your eyes away from it....Weird!

Cool stuff. Have seen them all before. There are countless number of books on these images as well.