“Geothermal sources currently produce only three-tenths of one percent of the world’s electricity. This promising energy source has long been limited by the extraordinary challenges of drilling holes that are deep enough to access the intense heat below the Earth’s surface.

Now, an MIT spin-off says it has found a solution in an innovative technology that could dramatically reduce the costs and timelines of drilling to fantastic depths. Quaise Energy, based in Cambridge, Mass., plans to deploy what are called gyrotron drills to vaporize rock using powerful microwaves.”

From IEEE Spectrum.