Buyers say this Klarus rechargeable ultra-slim flashlight is "incredible," and right now you can grab it for just $14. Don't get left in the dark—grab yours now.

This persnickety number determines the strength of magnetic fields. It figures in everything from motors and generators to audio speakers. Oh, and without it we’d live in eternal darkness.

Astronomers detect a fast radio burst from 10 billion years ago, FRB 20240304B, revealing clues about the early universe.

Electrons in a magnetic field can display striking behaviors, from the formation of discrete energy levels to the quantum Hall effect. These discoveries have shaped our understanding of quantum ...