Honeycomb board and paper helmet
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Can a paper helmet protect cyclists' heads?

12 January 2014 Last updated at 00:40 GMT

Half a million cycle trips are made each day in London, and a recent spate of deaths has put cycle safety at the top of the agenda.

One thing that can be important for safe cycling is a well-fitted cycle helmet.

Most helmets are made from polystyrene, but Dr Ayan Panja has been finding out how humble sheets of paper - arranged in an ingenious way - can offer even more protection.