This isn't actually a riddle, it's a real problem scientists have been ... they make up for in fog, like the Namib Desert. It's one of the oldest and driest places in the world.

These developments closed off the Atlantic Ocean, closing off an area for currents to circulate toward the equator. The process that contributes most to the Namib's unique ecosystem is the coastal ...

This story appears in the June 2011 issue of National Geographic magazine. At dawn, three weeks before the winter solstice, the last tendrils of fog curled gray against the pinking sky over a sand ...

some 60km east of the Atlantic Ocean. "However, due to the dry conditions in the Namib Desert the River seldom flows this far and the pan remains bone-dry most years. During an exceptional rainy ...