Ground-penetrating radar found 66 points on the dune's surface that might have something other than solid sand below. EPA / 5W Infographics She sobbed on the way home, and spent a sleepless night ...

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 ...

Hear the sounds of Mother Nature and enjoy a thrilling day of tackling one of Nevada's tallest sand dunes at this singing ...

This giant sand dune in southern Spain is about 98 feet high and 656 feet wide, making it one of Europe's largest sand dunes. What is perhaps even more fascinating is what hides beneath it.