|An auroch, or extinct wild ox, scraped into the limestone of Gobustan National Park. Photograph by Paul Salopek|
When aurochs moved across the plains and "talking" drums rang out.
Paul Salopek is walking the global trail of the first humans who migrated out of Africa in the Stone Age. His continuous 21,000-mile foot journey, called the “Out of Eden Walk,” is recorded in dispatches... (Audio) Out Of Eden Walk