art How to make an astonishing Pepper's Ghost illusion with a plastic cup lid and your phone David Pescovitz

optical illusions The secret behind gravity-defying hills unveiled Mark Frauenfelder

optical illusions Have you ever seen the Pigeon Neck illusion? Rob Beschizza

optical illusions Mindbending optical illusion: Which of these buses is going faster? David Pescovitz

optical illusions This mind-melting optical illusion is called the Hermann Grid David Pescovitz

optical illusions There are no red pixels in this image of a Coca-Cola can Mark Frauenfelder

optical illusions You can't believe your eyes: there's no red in this traffic light Mark Frauenfelder

optical illusions This optical illusion of spinning rings will mess with your mind David Pescovitz

optical illusions Straight lines look wavy in this striking optical illusion Mark Frauenfelder

optical illusions These boxes aren't moving – an optical illusion I can't explain Mark Frauenfelder

optical illusions Incredible video of horses appearing to walk on water David Pescovitz

optical illusions The Rakotzbrücke devil's bridge creates the illusion of a circle when it is reflected in the water beneath it Popkin

optical illusions In this 3D-printed sculpture, how does the ball defy gravity and roll uphill? David Pescovitz

optical illusions The bizarre "scintillating grid illusion" Mark Frauenfelder

art Does your perception of this optical illusion tell you something about your personality? David Pescovitz

optical illusions Optical illusion delivers incredible depth without having to cross your eyes and get a headache David Pescovitz

optical illusions The Phantom Queen is an awesome optical illusion Mark Frauenfelder

optical illusions A driver experienced this astonishingly weird and scary optical illusion in a tunnel David Pescovitz

optical illusions This hollow mask illusion fools me every time Popkin

optical illusions Check out this stunningly strange double optical illusion David Pescovitz