Off TopicAre you a QOTWer? Do you want to start a thread that isn't a direct answer to the current QOTW? Then this place, gentle poster, is your friend.
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rob, Sun 1 Apr 2001, 1:00)
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Sorry, I've been in a meeting, but I'm here now, so I can take this one.It's due to increased Rayleigh scattering of shorter wavelength light by air molecules, coupled with increased absorbtion towards the ultraviolet end of the spectrum. HTH xx
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the mighty badger Aphrodite, on a bar stool, by your side, Wed 11 Dec 2013, 15:09,
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