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If you'll open your textbook to page... oh, the cat's sitting on it

Moving house? Who you gonna call?

Venn diagrams, retrograde chess, and behind-the-scenes Christmas lectures all feature in our autumn 2021 edition. Plus all your favourite puzzles & columns.

Can you solve it?

We chat to the crypto chief about inventing RSA... but not being able to tell anyone

Hugh Duncan explores an exciting variation on Conway's Game of Life