More from Chalkdust
Dog leads, mirrors and Hermann Minkowski
Donovan Young looks at the shapes made when two cones collide
Danny Chung Does Not Do Maths
We review the first of this year's nominees for the Book of the Year
How Polish cryptographers first broke the unbreakable cipher
Kimi Chen deciphers the 1920s story you haven’t heard
On the cover: Apollonian packing
David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11
The Chalkdust Christmas card
This year's Chalkdust puzzle Christmas card
The statistics of a squeaky bum
Does form going into the play-offs predict your success?