Relax and concentrate on the 4 small dots in the middle of the picture for approximately 30 seconds. Take a look at a wall near you ( or any smooth , single coloured surface ). You will see a circle of light developing. Start blinking your eyes a couple of times and you will see a figure emerging… What do you see? moreover, who do you see?

This is an actual picture of the surface of mars takes by viking in 1976.

This is another one of those images that flip-flops back and forth as you stare at it!

Stare at this and it will invert

Do you see the two shades of green below?
Would you believe that there is actully onlu one shade of green?