Rotating Rings

This one freaks a lot of people out. Every time you switch from looking at the red dot to the yellow, or vice versa, both wheels start spinning in the opposite direction. The illusion exploits differences in the way we interpret motion in the center of the visual...

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American Gothic

In 1930, Iowa artist Grant Wood painted American Gothic. The models he used for the painting were his sister Nan Wood Graham and his dentist, Byron McKeeby.

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