optical illusions Mesmerized by the rotating crosses Jason Weisberger

optical illusions The Playful Eye is a virtual feast of games and visual tricks gathered from around the world Kevin Kelly

optical illusions Animal silhouettes in negative space between people Mark Frauenfelder

Kids Cat goes ape for this 2-D optical illusion Andrea James

art Watch MC Escher make art in this short documentary David Pescovitz

optical illusions The strawberries in this photo are blue Mark Frauenfelder

optical illusions 7 amazing optical illusions Mark Frauenfelder

optical illusions "I'll never trust another trapezoid" Mark Frauenfelder

music Bonobo's brilliantly claustrophobic music video imagines life indoors Andrea James

optical illusions Optical illusion – can you see all 12 black dots at once? Mark Frauenfelder

art Dizzying designs by Peter Kogler seem to warp space Andrea James

optical illusions Opitical illusion: paint, or oily legs? Mark Frauenfelder

art The optical illusion that's momentarily intriguing the internet Rob Beschizza

optical illusions Photos of blue powder look 3D Mark Frauenfelder

optical illusions The two objects are traveling in exactly the same manner Mark Frauenfelder

optical illusions Cube illusion Mark Frauenfelder

optical illusions Impossible rooftop illusions Mark Frauenfelder

optical illusions Change this train's direction with your mind Mark Frauenfelder

optical illusions Concentric circles, not a spiral Jason Weisberger

optical illusions Cylinders turn into squares when viewed in mirror Mark Frauenfelder