WIRED @WIRED
There's zero red in this picture. The berries look red, but they're not. They're gray. This illusion hinges on something called color constancy. Here's how it works: https://t.co/Cf3QG3zSyt 📸: Akiyoshi Kitaoka https://t.co/KYUv3ZOkyd — PolitiTweet.org