Their mission? To create a dul-tson-kyil-khor, or mandala of colored powders (commonly referred to in English as a sand mandala), over the course of five days. Constructing one of these intricate ...

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 ...