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The Guardian - UK
The Guardian - UK
Lifestyle

Why do crash helmets come in so many different shapes?

Bradley Wiggins adjusting his cycling helmet
Fine, but don’t try falling out of a plane in that ... Bradley Wiggins.
 Photograph: Gian Mattia D'Alberto/AP

Why is it that falling off a horse, falling off a bicycle, falling off a motorcycle, falling out of an aeroplane and falling off a mountain each require a different hat?

Colwyn Lee, Swarkestone, Derbyshire

• Post your answers – and new questions – below or email them to nq@theguardian.com

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