Via speigl.org via verylowsodium: Instructions: 1. Stare at the image for 10 seconds 2. Look at something — your hand, a book, your friend 3. Enjoy! For more on illusions — and the delight of our buggy minds — see Al Seckel’s 2004 TEDTalk >>Continue reading
Why you should listen
Al Seckel took great delight in visual illusions and the brain mechanics that they reveal. The author of many books and articles, he also designed interactive museum exhibits around the world that allow visitors to play with illusions and understand how they work.
A noted lecturer, he was a member of the Edge Foundation, a founder of the Southern California Skeptics, a campaigner against the teaching of creationism in public schools -- and co-creator of the Darwin Fish. Seckel died in 2015. Watch his 2010 talk from TEDxUSC: "[Y]Our Mind's Eye" >>
Note: A previous version of this biography described Seckel as a "cognitive neuroscientist," which was not accurate.
What others say
“Al Seckel is acknowledged as one of the world's leading authorities on illusions.” — Edge.org
Al Seckel’s TED talk
Can you reverse her direction of rotation? Cognitive Daily at ScienceBlogs took a reader poll and found that two-thirds saw the silhouetted woman rotating clockwise. About the same number were able to reverse her direction. Those who initially saw the woman rotating counter-clockwise found it easier to reverse her direction — much as the Necker […]Continue reading
Filmmaker and animator David O’Reilly (who came up with the concept for iHologram) has noticed an interesting property in this animated GIF: He writes: While working in 3D last year, I discovered this optical illusion: A large grid seen rotating at a certain speed will appear to group itself into smaller grids, spinning independently. See […]Continue reading