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
Issue 18
Twitch streaming, abacuses and Pascal's secrets feature in our AW23 issue! Plus all your favourite puzzles & columns.
The power of curly brackets
Mats Vermeeren sketches a simple proof of Noether's first theorem
Should you buy a Valentine’s day present?
For those of you tackling this dilemma, here's your answer...
