Looks like someone else is finally coming round to my way of thinking on
this one:

http://www.bbc.co.uk/news/science-environment-21991487

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Graham P Davis, Bracknell, Berks.
Carlos Seixas, Sonata nº 1: http://www.youtube.com/watch?v=YXox7vonfEg
And for something completely different, Cumberland Gap:
http://www.youtube.com/watch?v=AsU-LTwx8Co