The rotating-mass gyroscope, which lies at the heart of inertial measurement units (IMUs), has served very successfully from the 1930s to the 1970s, guiding astronauts, spacecraft, missiles, and more.

PASADENA, CA—Gyroscopes are devices that help vehicles, drones, and wearable and handheld electronic devices know their orientation in three-dimensional space. They are commonplace in just about every ...

A shotgun is obviously the more satisfying approach, but researchers at the Korea Advanced Institute of Science and Technology have found a simpler way to knock drones out of the sky—by targeting ...