Stargazers across the US have been baffled by a mysterious beam of light streaking through the sky. Around midnight on Saturday, May 17, a glowing streak was visible above the US as far south as ...

read a message from numerous commenters. Separate Facebook posts showed a similar bright beam of light, with some coming from northern Arizona. Meanwhile, posts on X from New Mexico captured the ...

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 ...