Mathematicians have not yet succeeded in finding a formula for the number of different ways a road map can be folded, given n creases in the paper. Some notion of the complexity of this question can ...

They were like fitted sheets for the car — wonderful to keep things in place, but nearly impossible to refold. Sometimes it was easiest on your blood pressure to crumple them into a ball and cram them ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter. The writer is a contributing columnist, based in Chicago Last month, Tonika Lewis Johnson won a MacArthur ...