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
Top Ten: pictures of scorpions
The definitive chart of the best pictures of scorpions
Origami tesseract
Folding origami, building networks, making projections and multiple dimensions!
Puzzles about calculus
Can you solve these puzzles about differentiation and integration?
