A magazine for the mathematically curious

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Published 8 March 2025 at 707 × 429 in A symmetric universe

basketballs

Spinning basketballs at different angles

Sam is a maths student at Durham University where he hosts
Chalkboard Ultra podcast and spends too much time thinking about the Standard Model and Mexican hats. If he’s not pestering Adam then he can definitely be found playing the keytar in a funk band completely unrelated to quantum field theory.

A symmetric universe
Sam Kay reflects on building a universe
The big argument: Should we write another issue?
How much barrel is left to scrape?
The big argument: What’s the best way to end a proof?
QED or $\square$?
What’s hot and what’s not, Issue 17
Fashion is fleeting, Chalkdust regulars are not.
Crossnumber winners, Issue 14
Did you solve it?
Is it possible to reach absolute zero?
After 100 years, a key postulate of the third law of thermodynamics has been proven. We meet Lluis Masanes, one of the researchers responsible.