"An international team of geologists and oceanographers has reconstructed the history of a catastrophic flood of the Bosporus. Radiocarbon dating of the transition from freshwater to marine organisms in the cores put the time of the event about 7,500 years ago, or 5500 B.C. Dr. Ryan and Dr. Pittman suggest a link between the abrupt rise of the Black Sea and cultural changes in Europe and elsewhere." (Quoted from article)