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
An uncomfortable truth
Lucy Rycroft-Smith and Darren Macey unpick the legacy of some of the most ubiquitous names in statistics
In conversation with Nazar Miheisi
Our first interview celebrating Black Mathematician Month
Hunting for polydivisibles
The search for polydivisible numbers in different bases: how many can you find?
