More from Chalkdust
- David Sheard sets the third puzzle. Can you solve it?
- Some saucy modelling
- David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11
- Axel Kerbec gets locked out while exchanging keys
- Looking back at the exciting day that closed our 2018 celebrations
- Reviewing this week's conundrum prize... science-y stuff staring you in the face!