There's plenty of air in the tiny spaces between grains of sand; the problem for sand-burrowing animals is how to get that air into their lungs while keeping the sand out ...

Desert sand, whipped by years of wind, has smooth grains that prevent it from binding with most materials used in industrial applications. By contrast, sand extracted from rivers, lakes ...

And desert sand, like ocean waves, rolls and bounces. And these self-organizing individual grains create ever-shifting wave-shaped ripples on the dune’s surface. And human hands form images that ...

Some of the world's tallest sand dunes are located in the Sahara Desert. These dunes typically ... to differentiate between the sizes of sand grains and the water content within various layers ...