DoorDash Inc., the largest food-delivery app in the U.S., unveiled a delivery robot and a smart scale for restaurants, showcasing the company’s years-long effort to develop hardware.

Across a Swiss meadow and into its forested edges, the drone dragged a jumbo-size cotton swab from a 13-foot tether. Along its path, the moistened swab collected scraps of life: some combination of ...

Artificial superintelligence may be available by 2030, but its capabilities are only likely to surpass humans in some aspects, the head of one of China's hottest AI startups said on Tuesday.

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