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
Significant figures: David Singmaster (1938–2023)
Colin Wright remembers the puzzle giant with a passion for sharing
Prize crossnumber, Issue 09
Win £100 of Maths Gear goodies by solving our famously fiendish crossnumber
Introducing the Chalkdust blog
We have some fantastic blog articles, and this is how we plan to publish them.