reddit The trick that makes spot-the-difference puzzles ridiculously easy Mark Frauenfelder

optical illusions Are you upset by the anvil of pareidolia? Rob Beschizza

fright flights Phew! Creepy alien on a recent flight turns out to be an optical illusion Carla Sinclair

Science This Victorian ghost book exposed spiritualist frauds with cool optical illusions Ellsworth Toohey

optical illusions Brain-bending experiment reveals why kids struggle with writing Mark Frauenfelder

art This interactive op art will spank your eyeballs and twist your synapses Allan Rose Hill

optical illusions Incredible sight as seven suns mysteriously appear over China (video) Allan Rose Hill

Delightful Creatures What is this bizarre-looking creature? Keep looking and it becomes clear Mark Frauenfelder

footage Snow sliding down windshield creates trippy illusion Popkin

optical illusions There is no red in this photo of a Coke can Mark Frauenfelder

optical illusions Mind-bending visual trick by Japanese psychologist: is it yellow or white? Mark Frauenfelder

optical illusions Astonishingly weird video of commercial airliner freezing in mid air David Pescovitz

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