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
Seeing double
Take a ball, divide it into parts, glue them back and get two identical copies of your ball!
Review: Mathematical T-shirt
A summer essential or an embarrassment risk on the streets of Ibiza?
Reinventing 2D: What a difference a matrix makes
How derivatives of matrices are being used in your day-to-day lives
