Deep below the surface in South Dakota, construction crews have been working tirelessly to carve out a network of caverns and tunnels that one day will house a huge neutrino experiment. Their efforts are paying off: With almost 400,000 tons of rock extracted from the earth, the excavation is now half complete.
Click here for original story, Excavation of massive underground caverns for Deep Underground Neutrino Experiment halfway complete
Source: Phys.org