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Excavation starts for U.S. particle physicists’ next giant experiment

    From Science, July 21, 2017: To build the modular detector, workers have to carve out massive caverns 1,480 meters underground, haul out stone that weighs as much as a dozen aircraft carries, and truck in millions of liters of frigid liquid argon. On July 21, officials gathered deep underground to turn the first few shovels of stone.