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Watch: The best illusion of the year

Check out the winner of the 2014 Best Illusion of the Year Contest. Created by psychologists at the University of Nevada, Reno, this optical illusion starts with an image of a circle surrounded by other circles. As the video begins and the exterior circles grow and shrink, it looks like the center circle is changing size, too—but it isn’t. Dubbed “The Dynamic Ebbinghaus,” the trick is a spinoff of the original Ebbinghaus mirage created in the 1800s.

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