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
Chalkdust Book of the Year 2021
We announce the shortlist of our favourite maths-themed books of last year
Prize crossnumber, Issue 11
£100 of MathsGear goodies to be won if you can solve it
Review of Problem Solving in GCSE Mathematics
We have a go at the puzzles in Daniel Griller’s new book
