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 ...

Bowl blowouts are deep ... Transgressive dunefields have also been termed mobile dunes, sand drifts, and migratory dunes. Such dunefields may range from quite small (hundreds of metres in ...

From the towering Great Sand Dunes of Colorado to the otherworldly ... A look at exquisite double Ikat Patola saree 'I told him to bowl a slower ball but he ran and bowled a 155kph yorker ...