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In 2018, scientists discovered a new shape that is essential to multicellular life

Cardioids in coffee cups, counting with three fingers, and breakfast at Villani's. Plus the return of all your favourite fun pages in our autumn 2017 issue.

Vote for your favourite mathematical celebration day

Make calculations easy with this simple-to-make slide rule

Behind today's door... The Chalkdust guide to Christmas presents

How derivatives of matrices are being used in your day-to-day lives