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: flexahedron
Connie Bambridge-Sutton invites you to make a flexible 3D shape
Killing by numbers: the mathematics of warfare
A blast from the past. Modelling battle grounds from ancient Greece.
Carnival of Mathematics 133
This month's round up of mathematical blog posts.
