Mathematicians and engineers have teamed up to show how ultrasound waves can organize carbon particles in water into a sort of pattern that never repeats. The results, they say, could result in ...

Nick and Sally copy a sound pattern of buzzes and bells, to unlock a door. When a locked door plays a series of sounds, Nick and Sally try to repeat the sounds, to get the door to unlock. It works!

Mysterious radio signals from space have been known to repeat, but for the first time, researchers have noticed a pattern in a series of bursts coming from a single source half a billion light-years ...