World's Oldest Ship [6min @15:32]

They sailed the seas 4,000 years ago. And their journeys covered thousands of miles, in search of treasure. Now, millennia after they were put in dry-docks, the remains of ships that plied the Red Sea have been unearthed -- and researchers say they may be the oldest such remains in the world. They were discovered in caves at the edge of the Egyptian desert -- and they provide clues to an amazingly complex part of ancient Egyptian culture. Cheryl Ward is a professor of anthropology at Florida State University. We reached her in Tallahassee.