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
Puzzles, Issue 04
Solve the puzzles that appeared in Issue 04.
Tennis maths: how long should a deuce point last?
Using Markov chains to calculate some interesting tennis stats!
Stopping distances in the Highway Code are wrong
An easy equation to remember for your driving theory test, with dangerous consequences
