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

Dear Dirichlet, Issue 22
Rhythm, rivers and rises pollute the prof's postbag this issue
Oπnions: In defence of toy models
Calum gets on his soap box about toy models
Dear Dirichlet, Issue 20
Cricket, coursework and karaoke are among the problems solved in this issue's Dear Dirichlet agony aunt column
Markov unchained
Ashleigh Wilcox looks for integer solutions to the Markov equation
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
