At launch, the GS4 will be offered in Frost White and Black Mist, and both colors feature a cross-stitching pattern across the front and back.

ENGADGET: Samsung Galaxy S 4 review Mobile

When in leaf it's easier to spot because it seems as if the foliage has been damaged by a severe frost and turns limp and black.

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The government asked Professor Carol Black and the former head of the British Chambers of Commerce David Frost to consider radical changes to deal with the human and financial cost of sickness absence in the workplace.

BBC: GPs should 'not sign off long-term sick'