Paul Salopek's 'Out Of Eden' Trek Will Last 7 Years, And This Is Just The Beginning (PHOTOS)

"Are you crazy? Are you sick?" These are questions Pulitzer Prize-winning journalist and National Geographic Fellow Paul Salopek is going to have to get used to hearing. After all, he is just 11 months into a seven-year, 21,000-mile trek around the globe to trace the theory of human migration out of Africa some 60,000 years ago. Salopek named the project 'Out of Eden,' a nod to the "greatest voyage" human beings ever took, from the cradle of the African desert to eventually cover the rest of the...