Optical illusions so mind blowing, you will think you were in the cloud (25 Photos)

Probably one of the most unbelievable illusions out there, this one was first published by Edward Adelson, a professor at MIT. Although the square labeled “A” appears to be darker than the square labeled “B”, they are actually exactly the same shade of gray. Its okay if you don’t believe it, we didn’t either, but Photoshop proved us wrong. Don't worry, you're not crazy, your mind is just blown.