More from Chalkdust
How to write a crossnumber
Matthew Scroggs explains how to get digits all riled up
Significant figures: Sofya Kovalevskaya
Nora Koparan tells the story of the first female professor of mathematics
Weirdest Maths
We review the third of this year’s nominees for the Book of the Year
Snowflake, the symbol of winter: different sizes, infinite shapes
Winter is coming!
Man vs Maths
A review of Timothy Revell's new book, describing the hidden mathematics behind our world
Chalkdust Issue 2 coming soon! 06/10/15
Find out what's going to be inside