This Is Your Brain, On Light

Lest anyone doubt the ability of lighting to manipulate our minds, here's a quick little illusion to scramble your brain. I read the full explanation on the YouTube page (you'll have to click 'show more' under the video there) and I think I understand it. Maybe.

But my brain is still a little scrambled by the fact that what looks like a shadow in the checkerboard isn't actually a shadow. It's a tone.

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[BrussPup via Giz]