Today’s illusion is from an article written by Barton L. Anderson and Jonathan Winawer and published in Nature (the international weekly journal of science).  Remarkably, the chess pieces on the top and bottom images are identical!  It may seem hard to believe, but it is true.

When surrounded by a dark color (like the top portion), the chess pieces appear as light objects.  When the background haze is changed to a light color (like the bottom portion), the chess pieces suddenly appear to be dark objects.

(via Nature)

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