More from Chalkdust
- Books, business and barns are the topics readers have sent in to the professor's postbox this issue
- Humbug sets the fourth puzzle. Can you solve it?
- Andrei Chekmasov explores order and infinity
- Think outside outside the box in our spring 2018 issue. No more tennis puns, primes mod 4, plus all your favourite regulars.
- We chat to the chief scientific advisor to the Home Office about the role of scientists and mathematicians in politics
- Something for you to solve during the post-Christmas lull