Negative pressure is a rare and challenging-to-detect phenomenon in physics. Using liquid-filled optical fibers and sound waves, researchers have now discovered a new method to measure it. In ...

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

Nothing can travel faster than light. But what if we switched the rules a little? Imagine a world where the speed of light was slower. Way slower. About the speed that sound travels at. In turn, the ...