This post was part of the Chalkdust 2016 Advent Calendar.
Today is the final day of the Chalkdust advent calendar.
More from Chalkdust
- Squid Game, hidden harmonies and DnD coming your way in our brand new issue! Plus all your favourite puzzles & columns.
- Ellen talks to the mathematician and scientist about Attenborough, arctan and Antarctica
- Win a £100 Maths Gear goody bag by solving our infamous puzzle
- E Adrian Henle, Nick Gantzler, François-Xavier Coudert & Cory Simon team up for a deadly challenge
- Weddings, holidays and catfish find their way into the prof's postbox this issue.
- Goran Newsum always should be someone you really love