Genetic analysis has revealed the contents of an ancient shipwreck dating back to the era of the Roman Republic and Athenian Empire. The cargo was olive oil flavored with oregano. Beyond discovering ingredients for Italian salad dressing on the sea floor, such research could provide a wealth of insights concerning the everyday life of ancient seafaring civilizations that would otherwise be lost at sea. An international team of U.S. and Greek researchers investigated the remains of a 2,400-year-old shipwreck that lies 230 feet (70 meters) deep, roughly a half-mile (1 kilometer) off the coast of the Greek island of Chios...