Physicists have figured out how to move an object in three dimensions without the need for any physical contact, just by the clever use of magnets. Magnetic Levitation, MagLev for short, is the ...

The ability to detect motion and track a moving object hidden around a corner or behind a wall provides a crucial advantage when physically going around the obstacle is impossible or dangerous.

In recent years various techniques have emerged that make 3D imaging cheaper and faster. Some consumer devices, such as the iPhone X and the Microsoft Kinect, can create such images. And in industry, ...