Did you hear the sand squeak? Why does it?
Does it ever sound like the sand is squeaking when you take a walk on Alabama beaches? There’s a very scientific explanation for why that happens. Squeaking - or whistling - sand is heard when quartz sand is well-rounded and shaped in spheres, according to Scientific American magazine. “The frequency of the sound is related to the mean grain size and the amplitude is controlled by the surface texture of the grains,” according to the article. “The loudest squeaking observed [...]