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: Calculator buttons
The definitive chart of the best buttons
Black Mathematician Month 2018
We look back at last year's Black Mathematician Month, and give a preview of what to expect this October.
Closing the Gap
A review of Vicky Neale's new book about the quest to understand prime numbers.
