art How to make an astonishing Pepper's Ghost illusion with a plastic cup lid and your phone David Pescovitz
optical illusions Mindbending optical illusion: Which of these buses is going faster? David Pescovitz
optical illusions You can't believe your eyes: there's no red in this traffic light Mark Frauenfelder
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
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 A driver experienced this astonishingly weird and scary optical illusion in a tunnel David Pescovitz