World's driest desert quenches thirst with fog

Every morning at dawn, a thick mist known as "The Darkness" blows in from the Pacific to the edge of the Atacama Desert, the most arid place in the world.

After tantalizing the northern Chilean desert with the promise of moisture, the mist evaporates in the sun, leaving the heat to bake the stark lunar landscape.

But the South American country is researching how to use a technique called "fog harvesting" to collect this mist in large quantities and deliver it to communities that currently depend on water shipped in from the city in tanker trucks.