optical illusions Learn About "Fork-and-Knife Illusion" From A New Scientific Paper Written By A Middle-schooler Thom Dunn

optical illusions Astonishing photos of huge ships mysteriously floating in the air above UK seas David Pescovitz

optical illusions Optical illusion has drivers concerned that new bridge support is leaning dangerously David Pescovitz

optical illusions Man 'stunned' to see a ship floating in the air while on a stroll Carla Sinclair

optical illusions Trippy new experiments in "Magic Eye"-style autostereograms David Pescovitz

optical illusions Is there a seed in this avocado? David Pescovitz

optical illusions Optical Illusion: What do you see, zigzags or curves? Carla Sinclair

optical illusions How to draw a 3D cube illusion on graph paper Clive Thompson

optical illusions More on the Ames window illusion Gareth Branwyn

psychology Interactive site showing how 141 optical illusions work Clive Thompson

optical illusions Are these circles moving? Mark Frauenfelder

optical illusions These columns are straight (and not moving) Andrea James

maker How to make an impossible two-legged chair Andrea James

optical illusions This image will disappear if you stare at it long enough Andrea James

art Computer finds faces in grains of sand David Pescovitz

Science Watch this cool demonstration of an Ames window Andrea James

optical illusions If you rotate this photo of a spaceship, it looks like a car in the water Mark Frauenfelder

optical illusions These boxes aren't rotating. It's an optical illusion. Really. David Pescovitz

optical illusions Watch and rewatch this optical illusion to figure out how it's done Carla Sinclair