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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
On the cover: Vhat? Vhere? Venn
Madeleine Hall takes a brief dive into the world’s favourite set-relationship-representation diagram.
Balancing the equation
Reviewing the Royal Institution's first Black History Month event.
Killing by numbers: the mathematics of warfare
A blast from the past. Modelling battle grounds from ancient Greece.