LIFT A SHELL from the sand to your ear and everyone knows you can hear the sea. But listen carefully enough and you can hear shells in the sand too. Sand, it turns out, has a signature sound of its ...

Last summer, Stephanie McNamara got her first glimpse of Great Sand Dunes National Park and Preserve in southern Colorado. The park is a monument to sand, where dunes stretch across 30 square miles ...

At a small number of beaches around the world, dry sand actually makes noise underfoot, caused by friction between silica-rich grains. These “singing sand” beaches exist on every continent except ...