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

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 ...

Elko says aside from being an aesthetic addition ... the birds as they’re migrating. And the dunes are starting to build up ...

Behind many of these beaches are sand dune systems which provide homes for diverse forms of wildlife including plants and insects, some so highly specialised that without these dune habitats ...