The Vault is Slate’s brand-new history blog. Like us on Facebook, and follow us on Twitter @slatevault. Find out more about what this space is all about here. Young John Barstow must have found it ...
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 ...