Marine archaeologists began studying the 39-foot-long vessel—nicknamed the "Zambratija boat" because of its location in the Bay of Zambratija—after hearing reports from local fishermen in 2008. Researchers were surprised to learn the vessel dated to between the 12th and 10th centuries B.C.E, which they say makes it the oldest entirely hand-sewn boat in the Mediterranean.Workers painstakingly constructed the vessel by using flexible fibers to stitch together pieces of wood. While that technique was popular around the world both before and after the introduction of metal components, researchers say the Zambratija boat is unique because it's a rare surviving example of...