Awesome visual cortex mess-up!

This seriously hurts your brains!

http://antwrp.gsfc.nasa.gov/apod/ap070717.html

If you dont believe their proof image, do this. Cut-n-paste the image into paint, then cut and move the B square into the A square space. They blend perfectly.

My office is not working now (figuring out how the f. is this possible).