Dr Hoch's team extended this idea, arguing that as a plant starts to disassemble its light-gathering apparatus in preparation for winter, its leaves become particularly sensitive to light damage.

ECONOMIST: The science of autumn

Cold, yes, but we got very close to a young male marsh harrier, perching on a branch and I shall never forget his imperious glare, feathers golden in the low winter light.

BBC: Martha Kearney's week

It would mean that, in the north of Scotland, it did not get light until 10am in winter, and the Scots have therefore decided that it is a Sassenach plot to ensure that the Highlander is kept in the dark.

ECONOMIST: Time��s up