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
Modelling blood
Blood is exceptionally complicated and its composition varies from person to person. So how do we begin to model it?
To share, or not to share
A tragic love story of shares and viral songs. To share, or not to share...
You can count on Dirichlet
Counting the divisors of an integer turns out to be a rather hard problem
