Moments in human history are etched into the Earth. Now researchers are piecing together evidence of our impact on the planet ...

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 ...

For one billion people living in coastal areas around the world, these sand grains also defend against intense storms and sea level rise fueled by climate change. Coastal beaches and dunes act ...

Ask your students to think about different ways to make the sand grains stick together. One way to bind sand grains together is to mix it with cement and water, which produces concrete.

In 2019, researchers revealed that some of the grains of sand on beaches near the Japanese city of Hiroshima are in fact particles of debris created when the US dropped an atomic bomb on the city ...