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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.

Cryptic wordsearch, Issue 19
Can you solve it?
We don’t talk about the integers
Simone Ramello explores the hic sunt leones of the friendliest numbers we know...
On the cover: skyrmions
Sven Bjarke Gudnason and Calum Ross introduce you to the wonderful world of skyrmions
Crossnumber winners, Issue 16
Did you solve it?
Maths and music, together in harmony
Uniting the teaching of mathematics and music can benefit pupils greatly in both areas.
Constructing a sphere with 455 cups
Paper cups do not follow a hexagonal pattern and the cones do not meet at a single point, but they do make a gigantic sphere