Here’s my vote for the best illusion ever. It was created by B. Pinna, G.J. Brelstaff / Vision Research 40 (2000) 2091–2096.
Loom your head toward, and away, from the center point. Print it out and bring to a bar, and it is even more impressive -- the paper appears to be twisting in your hands.
Some other time I'll tell you my speculation for why it works. (It is a
Mark Changizi is Director of Human Cognition at 2AI, and the author of books such as The Vision Revolution (Benbella, 2009) and Harnessed: How Language and Music Mimicked Nature and Transformed Ape to Man (Benbella, 2011).
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- ATLAS Higgs Challenge Results
- Radical Rethink: Sugars Are The Only Cause Of Tooth Decay
- The Chicxulub Meteorite Killed The Dinosaurs But Made Forests Great
- It's Almost 2015 - So Where Is My Hoverboard?
- Life After The 125 GeV Higgs: What Is Left Of Two-Higgs Doublet Models
- Genetically Modified Wheat, Without The GMO Drama
- No books for you! City Colleges of Chicago Students.
- "Being self-interested doesn't necessarily, or even usually, equate to acting unethically. OTOH..."
- "Cool. We can see that same effect in my image...."
- "Man, am I glad I don't go to an office where I have to wear two ties...."
- "Please explain what kind of modification you find natural and acceptable. Do you like red grapefruit..."
- "That's why biologists say survival of the fitter instead - if a bear is chasing us, I don't need..."
- Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution
- 'Smart material' chin strap harvests energy from chewing
- World Alzheimer Report 2014 reveals persuasive evidence for dementia risk reduction
- The Lancet: Scientists use modern forensic techniques to identify most likely cause of King Richard III's death
- Urine HPV test could offer non-invasive alternative to conventional smear, improve screening uptake