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 unique combination of sand and snow transformed a Colorado national park into an otherworldly winter wonderland, a stunning ...

Colorado offers perpetual wonders for outdoor enthusiasts and cultural buffs, with strange features in national parks to explore. In Great Sand Dunes National Park, Star Dune's mysterious ...

Most people think of deserts as sweltering expanses of sand, but not all deserts fit that scorching stereotype ... even dropping below freezing at certain times of the year. Let’s explore The Strange ...

Much like dunes on Earth, Martian dunes migrate as the wind blows away grains of sand from one side of a ... according to NASA. "The strange phenomena are just part of the seasonal changes on ...