A world-famous light experiment from 1801 has now been carried out with sound for the first time. Research by physicists in ...

When we talk about the speed of sound, we usually mean how fast it moves through air. But it can travel much faster through other media, and now scientists at the University of Cambridge and Queen ...

With speeds seven times the speed of sound, temperatures hotter than the sun and chemical reactions that rip apart air molecules, hypersonic flight sounds terrifying. But a professor and some students ...

On Mars, the speed of sound depends on its pitch. All sound travels slower through Mars’ air compared with Earth’s. But the higher-pitched clacks of a laser zapping rocks travels slightly faster in ...