International News Archive - November 15, 2012
Visualize a dusty place where stream beds are sand and lakes are flats of dried mud. Are we on Mars? In fact, we're on arid parts of Earth, a planet where water covers some 70 percent of the surface.
Symbiotic relationship between pollutants and airborne particles explains how city pollution ends up in Arctic
- The ragged surface of a lava-flow.