Though plentiful in arid regions, most sand is not viable for commercial use or construction. Desert sand, whipped by years ...

For ages 12 and older. How many grains of sand would it take to fill the universe? This is a problem that the Greek mathematician Archimedes tried to solve in the third century B.C. In this ...

Experience the mesmerizing satisfaction of cutting through vibrant yellow and green round sand, as perfectly shaped spheres crumble into smooth, grainy perfection. The soft crunch and vivid colors ...