This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American
If you've ever played with Legos, you know that they're all about straight lines and 90-degree corners. Not in this version of Akiyoshi Kitaoka's "Bulge" illusion, created by Mary Coffelt, Briena Heller, and Michael McCamy in our laboratories last summer. The strategically placed purple and white M&Ms distort your perception of the Lego checkerboard, making it bulge out.
To see the illusion disappear with a single breath, watch this video.
On supporting science journalism
If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.
Read more about shape distortion illusions and their neural bases in our Illusions column