Bad Astronomy This Illusion Will Drive You Mad By Phil Plait Nov 05, 20107:00 AM Tweet Share Share Comment Tweet Share Share Comment Enjoy. And if you like that, you’ll love these: The Blue and the Green Square Circle Spiral Hidden Circles Illusion A Lunar Illusion You’ll Flip Over Why Does the Moon Look So Huge on the Horizon? Tip o’ the Necker chief to BuzzFeed. Tweet Share Share Comment Advertisement