Quentin Williams, associate professor of earth sciences at the University of California at Santa Cruz offers this explanation
The SOHO spacecraft finds intricate plasma flows coursing through the sun
A converted oil exploration ship probes the seabed for clues to climate change and the inner workings of the earth.
A leading environmentalist reviews his long, contentious past and sets new directions for the future
Into the Wilds of Africa
Detailed computer simulations help scientists delve into the Earth's interior