Now Quaise Energy is planning to drill test holes up to 12.4 miles deep, using a 1-megawatt gyrotron that should zip through the rock in a mere 100 days. At these depths, the temperature will ...

The startup recently demonstrated this sci-fi-like technology in Houston, leaving behind a black, molted hole about 4 inches deep and 5 inches wide. It soon plans to drill up to around 12 miles ...