The “Bulge” Illusion, created by Mary Coffelt, Briena Heller, and Michael McCamy at the Barrow Neurological Institute in Phoenix laboratories last summer. The strategically placed purple and white M&Ms distort your perception of the Lego checkerboard, making it bulge out.

The Bulge IllusionImage credit: Mary Coffelt, Briena Heller, and Michael McCamy, Martinez-Conde and Macknik Laboratories, Barrow Neurological Institute

Still don’t believe it? Watch the bulge illusion disappear before your eyes in this video:

Story Source:  Scientific American