Social media users across the Southwest, including in Arizona, shared photos of a mysterious beam of light in the sky on the ...

What was the mysterious beam of light seen from Arizona and other western states on May 16? Was it STEVE? An astronomer offers insight on the cause.

While photographing the auroras during a geomagnetic storm, Mike Lewinski caught sight of something extraordinary: a ...

A relativistic electron beam travelling on an undulating path interacts with a laser and emits light carrying orbital angular momentum. The wavelengths of these bright twisted-light beams can go ...

A new kind of laser uses tiny moving particles to produce beams of light ... Conventional lasers repeatedly bounce light between two mirrors until it becomes bright and focused.