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The first negative dimension
A tribute to alumni Roly Drower by Hugh Duncan
The hidden harmonies of Hamming distance
Chris Boucher explores the secrets and symmetries behind a measure of the distance between binary strings
How Polish cryptographers first broke the unbreakable cipher
Kimi Chen deciphers the 1920s story you haven’t heard
Chalkdust Book of the Year 2020
We announce the shortlist
How to make: a slide rule
Make calculations easy with this simple-to-make slide rule