What makes a free radical so reactive, however, is that unlike most molecules it has an odd number of electrons and electrons prefer to arrange themselves in pairs.

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The offer is for only 70% of Sprint, an odd number.

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One set of clients, she reports, finally decided if they died together (say, in an auto accident) on a date with an even number, the child would be raised by one set of grandparents, and if they died on an odd-numbered date, by the other.

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"Thirty-odd cliff falls around the whole of the cliff path - not just Devon - is an unprecedented number and they still seem to be coming at the moment unfortunately, so it's all a bit alarming, " he told BBC News.

BBC: South West coast path landslips 10 times higher than normal