
how glorious would the world be if the roads had a faint smell of bacon
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Sat 25 Feb 2012, 9:53,
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A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light.
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Sat 25 Feb 2012, 10:04,
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