math The moving sofa math problem: still unsolved 50 years later Andrea James

art Someone left mysterious symbol-filled booklets in a London bookshop Ellsworth Toohey

Technology Donald Knuth, the godfather of computer science, says an AI solved a math problem he was stuck on for weeks Ellsworth Toohey

math Half a century of math mystery finally meets Baek Jin-eon Jason Weisberger

fbi New documentary explores the bizarre cover-up around the Boston Marathon Bombing Thom Dunn

serial killers Zodiac killer's unsolved code "behaves like fake ciphers" and therefore probably a ruse Rob Beschizza

Quantum Resurrection There's only one thing you've never done but are guaranteed to do Wink