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Peter Rowlett gets in a tangle ... KNOT!
Chalkdust Book of the Year 2021
We announce the shortlist of our favourite maths-themed books of last year
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Looking for a challenge? Try our cryptic crossnumber—with hints and tips so anyone can have a go!
Top ten vote issue 12
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Roots: Pythagoras of Samos
Pythagoras gave us so much more than a² + b² = c²
Time turns backwards at the Spark Festival
The extreme weirdness of slow viscous flows, and why borrowers shouldn't use doggy paddle.