issue_20_cover - Chalkdust

Calum is a lecturer in physics at Edge Hill University where he studies topological solitons and enjoys talking about maths and physics to anyone who will listen. He can often be found on the side of a mountain or out on a bike, talking to himself about solitons.

The human mug
Potatoes, mugs and doughnuts with Ashleigh Ratcliffe.
Oπnions: In defence of toy models
Calum gets on his soap box about toy models
Easy to state, hard to prove: The Collatz conjecture
90 years later, we're still unable to prove this surprisingly simple statement
Cryptic wordsearch, Issue 19
Can you solve it?
On the cover: skyrmions
Sven Bjarke Gudnason and Calum Ross introduce you to the wonderful world of skyrmions
Headscratchers
We review the eighth of this year's nominees for Book of the Year

More from Chalkdust

The human mug

Oπnions: In defence of toy models

Easy to state, hard to prove: The Collatz conjecture

Cryptic wordsearch, Issue 19

On the cover: skyrmions

Headscratchers