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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.

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
Prize crossnumber, Issue 13
£100 of Maths Gear goodies to be won if you can solve it
Linear algebra… with diagrams
Rediscover linear algebra by playing with circuit diagrams
Optimal Pac-Man
Matthew Scroggs spends too much time beating this arcade classic.

More from Chalkdust

Oπnions: In defence of toy models

Cryptic wordsearch, Issue 19

On the cover: skyrmions

Prize crossnumber, Issue 13

Linear algebra… with diagrams

Optimal Pac-Man