The critical tech staying safe by going underground

Earthgrid Chris Baraniuk Technology Reporter 3 hours ago A wall of white granite towered above a small team of engineers gathered in a California quarry. The ancient, ultra-hard material before them was, to most things, completely impermeable. Then the rock-melting tunnel-boring machine (TBR) roared to life. “It’s kind of like igniting a rocket,” says Troy […]