Sand dunes usually feel like the quietest places on Earth. Just wind, heat, and endless grains slipping underfoot. Yet in a few deserts around the world, dunes suddenly do something uncanny. They hum, ...

In some places, sand dunes protect shorelines from the onslaught of ocean waves. In other places, the dunes themselves are on the move, and threaten human structures. Host Flora Lichtman talks with ...

In Southern Colorado, the Great Sand Dunes are alive with the sound of music. The tallest dunes in North America rise above 750 feet — a surreal landscape that sings on scorching summer days. For that ...

As beach season and hurricane season ramp up, it's important to remember to stay off the dunes so they can do their job ...

Winds blowing over a dune can move grains of sand in three main ways. What path these grains take depends on their size, although the exact size in each category can change from site to site. Think of ...