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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
Playing billiards with cue-bics
Yuliya Nesterova misses all the pockets, but does manage to solve some cubics
You can count on Dirichlet
Counting the divisors of an integer turns out to be a rather hard problem
Fractograms
Hugh Duncan explores the hidden patterns of fractions

More from Chalkdust

Oπnions: In defence of toy models

Cryptic wordsearch, Issue 19

On the cover: skyrmions

Playing billiards with cue-bics

You can count on Dirichlet

Fractograms