It looks like the kind of spit you’d roast a pig on for some sort of tropical luau cookout. Except instead of flames, there is a supersensitive laser rangefinder. And rather than a suckling pig ...

In laboratories from Brazil to Munich, researchers are learning to grab matter with sound alone, sculpting ultrasonic waves into invisible “hands” that can lift, push, and rotate objects without a ...

Although their technique employs a method similar to laser trapping in biology, adaptable to a wider range of particle sizes and materials. The ability to move objects without touching them might ...

Smart glasses that emit a sound when an object comes into their field of view could help people who are blind to locate certain items. Some people who are blind can be trained to move via echolocation ...