The 72 period 4 points comprise two groups of bat orbits (top row), a central cobweb, and stretched quadrilaterals along the arms
Clare (like gare) is a Chalkdust editor. In her spare time, she’s an assistant professor at Durham University. She likes Skittles, probability, and making the magazine look more like Cosmo.
More from Chalkdust

In conversation with Christopher Lillicrap
Adam Townsend and Clare Wallace talk to the children’s programme creator about writing for younger generations
Chalkdust dissertation prize 2025
Calling all final-year students! This is your opportunity to get your work published as a Chalkdust article.
Chalkdust dissertation prize
Calling all final-year students!
The big argument: What’s the best way to end a proof?
QED or $\square$?
Chalkdust issue 10 – Coming 24 October
Come along to our launch party for free pizza and the real quiz
Slide rules: the early calculators
When slide rules used to rule... find out why they still do
