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.
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Calum gets on his soap box about toy models
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Agony uncle Professor Dirichlet answers your personal problems this Christmastime.
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Here is the reason why the golden era of Twitter is gone
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