Tesla’s robotaxi service has been mostly hypothetical so far, but it’s certainly taking the company’s shareholders for a real ride.

Researchers at Columbia University have created the first-ever car that uses evaporated water for power. It just happens to be a very, very tiny car: The car is powered by the shrinking and growing of ...

Tesla's robotaxi service has been mostly hypothetical so far, but it's certainly taking the company's shareholders for a real ride. Tesla debuted its ride-hailing service using cars with its so-called ...