We have no idea what we’re doing,” declared Elon Musk, standing beside a yawning “test trench” in Southern California in 2017 ...

Billionaire Elon Musk says he's almost completed a tunnel under a Los Angeles suburb to test a novel transportation system that would scoot commuters underground on electric sleds called skates. Musk ...

New York to Washington in 29 minutes? Elon Musk says it's possible and he has the government's approval to do it (though it's anyone's guess how long it would take to build). "Just received verbal ...