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Modern MarvelsHow the Comstock Lode, discovered near Virginia City, proved to be a scientific laboratory from which vast improvements in mining technology and safety were pioneered, including innovations in drilling, ventilation, drainage, and ore processing.

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Now PlayingModern MarvelsHow the Comstock Lode, discovered near Virginia City, proved to be a scientific laboratory from which vast improvements in mining technology and safety were pioneered, including innovations in drilling, ventilation, drainage, and ore processing.0Modern MarvelsDynamite explodes hills, drills divide stone walls, and giant cranes pull 400,000-pound blocks from quarry pits; rock serves as civilization's raw material for roads, buildings, paint, glue, makeup, antacids, and chewing gum.