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
Skimming potatoes
Ryan Palmer shares his chips – sorry – tips for finding the perfect skimming stone
Treating the differential with discretion
Sophie Bleau explores the differential on Morseback.
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
Variations on Fermat: an agony in four fits
Fermat's Last Theorem with complex powers, wrapped in a story every mathematician can relate to
