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Travel, trade and Tony Blackburn pepper the prof's postbag this issue

Donovan Young goes round the bend exploring what happens when the loop-the-loop goes wrong

We review the second of this year's nominees for Book of the Year

The definitive chart of the best buttons

This article will (unsurprisingly) tell you how to crochet a fractal

Read more about the fire-breathing curves that appear on the cover of issue 05