My Mind Is Boggled!

Both the A and B squares are the same color.
No, really...they are!

Anita Bath at Say No to Crack posted this first and ever since then, I catch myself staring at it more and more. It's finally starting to make sense to me.
Even with proof and an explanation from the man himself who created it, it's hard to understand how it works. But I think it has something to do with not being able to see the entire first row of the checkerboard because the green tube is in the way and just assuming it is what we believe it should be. What a great illusion!

I definitely wouldn't fit in at MIT.