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The two ways down shown on a Hasse diagram

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
Unlocking sudoku’s secrets
Sara Logsdon looks to graph theory and abstract algebra for help on the puzzle page
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
Domino tiling & domineering
John Dore and Chris Woodcock join the dots
Can we do good more effectively?
Choosing which charity we donate money to shouldn't be an entirely emotional decision.

More from Chalkdust

Oπnions: In defence of toy models

Unlocking sudoku’s secrets

Cryptic wordsearch, Issue 19

On the cover: skyrmions

Domino tiling & domineering

Can we do good more effectively?