April 13, 2005 The National Geographic Society, in partnership with IBM, launches the "Genographic Project." More than 100,000 DNA samples, collected over five years, will trace the origin and movement of humans.
December 20, 2002 Nearly a century ago, explorer Hanns Vischer undertook a grueling 1,500-mile journey by camel across the Sahara desert. He later said that he entered the desert like a fool, and left it nearly crushed. A modern-day explorer has recreated his trek.
August 6, 2004 Rickety vehicles ply Route 312, which parallels the old Silk Road, carrying traders who deal in cell phones rather than silk and spices. NPR's Rob Gifford continues his 3,000-mile journey across China with a bus ride through the Gobi Desert.