Experiments suggest that an unusual magnetic material can help harness energy from the planet’s rotation. But not everyone is ...

By applying an external magnetic field, the robot rotates ... It has a screw-shaped body with a helical structure, a cylindrical central tube, and a disk-shaped tail. The helix-shaped structure ...

"As light enters the fiber at a specific angular position of the ring-like fiber core, it first spreads around the entire cylindrical core and then perfectly recombines to form the original field ...

Electrets produce a semi-permanent static electric field, similar to how a magnet produces a magnetic field ... [Jay] 3D printed a simple cylindrical mold and stuck aluminum foil to the outer ...