Companies are using advanced technology to drill many miles underground to reach the hot rock below. Their quest is to make ...

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An engineering team bored 2 miles into hot rock without causing major earthquakes—a good sign for harnessing the Earth's heat as a power source.

GE pushes gas power for drill rigs, Caterpillar's diesel turf. By Reuters. November 12, 2013 6:20 PM UTC Updated November 12, 2013 Summary; Caterpillar has dominant position in market ...