Golden ratio [read everything]

Challenge #11 in the Symbols series. Hosted by nDray.
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Learn about the golden ratio first: http://en.wikipedia.org/wiki/Golden_ratio Then show us! If it's mathematical formulae with the golden ratio, great! But it is also present in nature, so go after it!
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P1060892-3
by Twoeyes
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Snail shells may not exhibit the perfect Golden ratio, but they are fascinating photographic subjects.
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Submitted: Wednesday, 13th July, 2011 11:16 (GMT)
Taken: Wednesday, 29th June, 2011
Focal length: 5.1 mm
Shutter speed: 1/60 sec
Aperture: F6.3
ISO: 320
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