Articles
Depicting Our Ancestors
In this audio slide show, filmmaker Graham Townsley describes what it takes to bring ancient hominids to life.
Photographing Climate Change
Acclaimed photographer James Balog describes his Extreme Ice Survey, a photographic record of arctic and alpine melting.
Mars Up Close
NASA's Steve Squyres narrates a virtual tour of some of the Mars Exploration Rovers' most revealing discoveries.
How the Egyptians Made Mummies
How did ancient Egyptians prepare a body for burial? Witness the elaborate process of mummification in this slide show.