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.
More from Chalkdust

Oπnions: In defence of toy models
Calum gets on his soap box about toy models
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
Once Upon A Prime
We review the third of this year's nominees for Book of the Year
Crossnumber winners, issue 10
Did you solve it?
The croissant equation
Each time you eat a croissant you might be biting more than 500 layers of dough!
