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
Formal sums
Nik Alexandrakis explains what they are and what they can tell us
Pretty pictures in the complex plane
Contemplate the beauty of the Julia and Mandelbrot sets and an elegant mathematical explanation of them
Fun with water bells
Explaining how surface tension makes water form surprising shapes
