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A new online seminar series. Each seminar is an accessible introduction to a theorem of the 21st century.

Can you solve it?

We review the fifth of this year’s nominees for the Book of the Year

The definitive chart of the best buttons

Independent Sage's Christina Pagel, hyperbolic mindfulness and make-your-own Markov tweet feature in our autumn 2020 edition. Plus all your favourite puzzles & columns.

A biography of Sophie Bryant