Are 3-mile-deep boreholes the long-term answer for nuclear waste stalemate?

Among geologists, there are givens: Humans don’t build things that last a million years. And only the bowels of Earth itself can be trusted to swallow — forever — the radioactive nuclear waste that humans have created.
So it was with a flush of optimism that the U.S. Department of Energy announced the Deep Borehole Field Test project in 2015. The $35 million idea was simple: Drill a test hole about 3 miles deep into Earth’s crust in rugged North Dakota. Study the properti