cool These gears aren't spinning. It's an optical illusion. Really. (strobe warning) David Pescovitz

dancing Watch this illusory mirror dance routine David Pescovitz

Entertainment Incredible optical illusions Jason Weisberger

illusions Freak out on this fantastic hand illusion David Pescovitz

illusions Weird illusion in which adding weight to something makes it feel lighter Mark Frauenfelder

Weird Bizarre family selfie in which half of man's body has vanished David Pescovitz

makers Watch this fantastic "Circle in Circle" optical illusion machine in action David Pescovitz

optical illusions Shake your head to see this image David Pescovitz

Science Enjoy this strange new audiovisual illusion from Caltech scientists David Pescovitz

Audio Neat audio illusion explained using that annoying Smashmouth song David Pescovitz

Science Your perception of this graph is a graph of your perception David Pescovitz

optical illusions Impossible objects, explained David Pescovitz

illusions The "Slip Chair" looks too unstable to sit in, but isn't Clive Thompson

pareidolia Pareidolia knife Rob Beschizza

art Amazing floating cube illusion Rob Beschizza

optical illusions Mesmerized by the rotating crosses Jason Weisberger

art This LEGO riff on Van Gogh's famous self-portrait is a great optical illusion Caroline Siede

Science 2016's Illusion of the Year will make you cover your screen with fingerprints Cory Doctorow

Science If you can see the baby in this photo you may be more prone to hallucinations or psychosis Mark Frauenfelder