A gold mask dating back over 3,000 years is among hundreds of relics uncovered from a series of sacrificial pits in southwest China, according to the Sichuan Provincial Cultural Heritage Administration. The finds were made at Sanxingdui, a 4.6-square-mile archeological site outside Chengdu that has yielded thousands of ancient artifacts since a local farmer stumbled across it in the 1920s. The golden mask, which was discovered in June but first unveiled earlier this month, weighs about 100 grams (0.22 pounds) and would have been part of a larger bronze head rather than a standalone object, according to state-run ... (full story)