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Uploaded by: Vaughn Carey  •  Category: General  •  Added on 27 April 2015

Description
Archaeologists may be a step closer to discovering the secrets of the ancient city of Teotihuacan: They have unearthed liquid mercury deep beneath the Mexican Pyramid of the Feathered Serpent. The “large quantities” of the toxic liquid metal leads researchers to believe that an undiscovered...