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 ... The water starts to move up into the sand cup slowly. Ask students to tell you when the soil is ...