On August 1, 2010 at the bottom of the Black Sea the only underwater river in the world was discovered by the scientists from the Leeds University; it is about 6,000 years old.
Length – 1,150 km. Breadth – 580 km. Surface area – 422,000 km?. The length of the water front – 3,400 km. The longest north-south extent — 580 km. The max depth – 2,210 mtr. Average depth – 1,240 mtr. The Black Sea lies between Bulgaria, Georgia, Russia, Romania, Turkey and Ukraine. It is an inland sea of the Atlantic Ocean basin. It is connected with the Sea of Marmara via the Bosphorus strait, and via the Dardanelles with Aegean and Mediterranean Seas. The Black Sea also connects to the Sea of Azov by the Strait of Kerch. The Crimean Peninsula projects into the Black Sea from the north. The water boundary between Europe and Asia Minor passes over the Black Sea. Such significant rivers as the Danube, the Dnieper and the Dniester, as well as the smaller Mzymta, Psou, Bzyb, Rioni, Kodori, Inguri flows into the sea in the east, Chorokh, Kizilirmak, Yesilirmak, Sakarya in the south, the Southern Buh in the north. The climate of the Black Sea is primarily continental. The Black Sea coast of the Caucasus and the southern coast of the Crimea are protected with the mountains from the cold northern winds and that is why have mild Mediterranean climate, and to the south-east from Tuapse – humid temperate climate. The Black Sea is as a rule ice-free. Water temperature is usually not lower +8 °C.