This story appears in the November 2012 issue of National Geographic magazine. I got my first lesson in the physics of sand dunes in 1998 on an expedition into the Sahara. In order to take aerial ...

A conveyor belt more than 40 miles long runs from tiny Kermit, Texas, across state borders into Lea County, New Mexico.

All these sand dunes make up one of the largest sand dune ... a sheltered area develops behind it. The water isn't moving much here, so it deposits sand and silt, so mud flats or salt marshes ...

Number of acres for oil and gas leasing deferred in 2018 due to lack of consultation regarding lands owned by the Navajo Nation Great Sand Dunes National Park and Preserve protects over 100,000 acres ...

This giant sand dune in southern Spain is about 98 feet high ... to its eastern side where you can swim in the crystal-clear water. In 2021, the site was even used in The Crown series to film ...