A strange form of matter called a time crystal has fascinated physicists for about a decade. These systems move in repeating ...

Time crystals, a collection of particles that "tick"—or move back and forth in repeating cycles—were first theorized and then discovered about a decade ago. While scientists have yet to create ...

That strange sound? It’s Earth’s magnetosphere—the magnetic field created by the movement of the iron core deep within the planet. The magnetosphere is a shield, protecting us from dangerous cosmic ...