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
Top Ten: Mathematical Monties
The definitive chart of the best monties
Review of The Element in the Room
Reviewing this week's conundrum prize... science-y stuff staring you in the face!
Thoughts on the crossnumber
Did you use meta-logic to solve the crossnumber?
