In the wooded hills south of Munich, Germany, engineers are drilling 8 km down in a bid to harvest limitless clean energy from Earth’s molten, radioactive core. The project could offer a blueprint for cost-effective geothermal energy extraction, helping Europe power cities, heat homes, and reduce its reliance on fossil fuels.  The drill belongs to Canadian company Eavor, one of a new crop of startups working to make geothermal a serious player in the energy game. Armed with an arsenal of plasma pulse drills, steel shot cannons, and robot worms, they plan to unlock Earth’s heat almost anywhere on the planet.…

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