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
Too good to be Truchet
Colin Beveridge looks at different designs for 2- and 3-dimensional tiles
Closing the first Black Mathematician Month
Reflecting on what we've learnt over the past few weeks.
Puzzles, Issue 02
These puzzles appeared in Issue 02 of the magazine.
