Elon Musk is back in the loop. Four years after encouraging anyone and everyone to try making his crazy hyperloop idea work, the Silicon Valley titan has decided he's not too busy to do it himself ...

The promise of hyperloop ranks near the top of the spectacular index: a network of tubes that will shoot people and their things from city to city at near supersonic speeds. But even if you never ...

Hyperloop One — a high-speed train startup endorsed by Elon Musk that nevertheless got sidetracked with project delays and bizarre sex-harassment claims against some of its executives and backers — ...

Eric Mack has been a CNET contributor since 2011. Eric and his family live 100% energy and water independent on his off-grid compound in the New Mexico desert. Eric uses his passion for writing about ...

The Virgin Hyperloop made its first journey carrying passengers Sunday, in a test the company claimed represented a major step forward for the "groundbreaking" technology capable of transporting ...