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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?
On the cover: skyrmions
Sven Bjarke Gudnason and Calum Ross introduce you to the wonderful world of skyrmions
Prize crossnumber, Issue 16
Can you solve it?
Issue 12
Independent Sage's Christina Pagel, hyperbolic mindfulness and make-your-own Markov tweet feature in our autumn 2020 edition. Plus all your favourite puzzles & columns.
Thinking outside the box
Negative polygons and other mathematical creations
The mathematics of tea-making
When-to-add-milk confusion and other related matters

More from Chalkdust

Cryptic wordsearch, Issue 19

On the cover: skyrmions

Prize crossnumber, Issue 16

Issue 12

Thinking outside the box

The mathematics of tea-making