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
Carnival of Mathematics 162
This month’s round up of mathematical blog posts from all over the internet
Mike Jordan on machine learning
Undoubtedly the most influential voice on this hottest of hot topics.
In conversation with Ian Stewart
We speak to one of Britain's most successful popularisers of maths
