If you buy something using links in our stories, we may earn a commission. This helps support our journalism. Learn more. Please also consider subscribing to WIRED Geometry was one of my favorite ...

When your project for the day is painting a room, you probably don’t reach for a calculator. And if any math does come up, it’s likely the stuff you’ve known since grade school: Estimate the area of ...

Michael Freedman’s momentous 1981 proof of the four-dimensional Poincaré conjecture was on the verge of being lost. The editors of a new book are trying to save it. One of the most important pieces of ...