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Space-filling curves, cheating at cards and automated joke generation feature in our spring 2020 edition. Plus all your favourite puzzles & columns.

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

A crossnumber clue takes us plunging headfirst towards projective geometry

Read about our least favourite numbers in this collection from issue 5!

We have a go at the puzzles in Daniel Griller's new book

Maths and Decision Theory to be the best at playing Guess Who?