And there is a small but growing number of people travelling to the outdoor locations where the series - which is adapted from the books of American author George RR Martin - is filmed.

BBC: Magazine

The material is an organic photovoltaic semiconductor (called rr-P3HT) which, unlike the metal or silicon-based materials used until now for such biotechnological interfaces, is soft, light, flexible and highly biocompatible and naturally sensitive to visible light.

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The photograph -- which may never before have been seen by the public, RR Auction says -- offers a glimpse of the future wife of Prince Charles lying down, perhaps on a bed, wearing a light sweater or top.

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The series, based on George RR Martin's best-selling books, has won numerous awards and nominations.

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The confirmation, based on analysis of 10 billion year-old dying RR Lyrae stars in the Gemini constellation, was done by an international team of astronomers who report their findings in The Astrophysical Journal.

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