More from Chalkdust
A symmetric universe
Sam Kay reflects on building a universe
The big argument: What’s the best way to end a proof?
QED or $\square$?
Folding nets into Johnson solids
How does one produce a net for the broadest class of polyhedra?
Primes à la Euler
Infinitely many primes ending in 1, 3, 7 and 9 proved in typically Eulerian style.
The pipe singularity
In the Aztec city of Atzlan, the scientist Remotep makes a revolutionary discovery
In conversation with Ian Stewart
We speak to one of Britain's most successful popularisers of maths