'Time travel to the future': Tech giants are touting quantum computing as the next big thing. But has the hype gone into hyperdrive?

Amazon, Microsoft, and IBM are all racing to build a quantum computer. But the technology's feasibility is as hazy as its physics.

Flying Taxis? China Has Them. And Drone Lunch Deliveries, Too.

Wuhan is one of a dozen or more Chinese cities with driverless taxis. Hundreds now roam most of the city, serving the airport ...