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Kenichi Takemura uncovers symmetries hidden in plain sight

While drinking beer in your favourite pub, have you ever wondered how it is produced? Find here some of the science and mathematics behind brewing.

Rediscover linear algebra by playing with circuit diagrams

Santa's sack of scientific surprises

Colin Wright juggles Euler, doodling and Millennium problems

These puzzles appeared in the Chalkdust newsletters. You can find the answers here and sign up for the newsletter here.