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.
More from Chalkdust

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
Christmas puzzles: the solutions
We reveal the solutions to our Christmas puzzles!
Reinventing 2D
What a difference a matrix makes
Music playlists, Facebook and Twitter
Here is a very exciting way to measure how similar is your music playlist between your friends, or how similar are your Facebook contacts.
