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
On the cover: cellular automata
Discover the meaning of the coloured squares on the cover of issue 13
Polynomials’ order
Yuliya Nesterova orders some polynomials around
How to crochet a fractal
This article will (unsurprisingly) tell you how to crochet a fractal
