More from Chalkdust
Significant figures: Sofya Kovalevskaya
Nora Koparan tells the story of the first female professor of mathematics
Will this article ever end?
Emilio McAllister Fognini explores the maths that made Turing so famous
Solutions to recent puzzles
Looking back at puzzles about complex numbers, tic-tac-toe, and the Eggnog Mystery
The maths ‘black box’
John Pougué Biyong explains how and why science communication can lead to better diversity.
Christmas cracker joke III
Behind today's door... A joke!
Will the Universe actually end in a big rip?
What the Guardian got wrong...