Every artist, interior decorator and housewife knows that blues are the most fugitive colors in the spectrum, especially when exposed to bright sun or harsh weather conditions. Blue draperies soon fade and blue painted flowers and skies turn muddy gray. How, then, could the Lowland Maya, whose climate can hardly be called benign, paint murals, pots, stelae and temples with a brilliant blue-green pigment that has defied sun, wind, biodegradation, erosion and acid rain for over 1500 years?

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