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Audi A8 review: This V-8 lightweight proves its mettle
Though you may not think of aluminum as a precious metal as you would gold, silver or platinum, the metal certainly had its heyday. Once scarce and valuable, it was prized by Napoleon III, shown at the Paris Exposition in 1855 and chosen to cap the Washington Monument in 1884.
By David Undercoffler, Los Angeles Times
November 10, 2010