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Every year, the coast of the Black Sea attracts hundreds of thousands of vacationers, who have no idea that the most terrifying secret of our planet has been hidden under the layer of dead water for millions of years. Under the crystal clear surface of the water lies a real hell. Cannibal sharks and the Loch Ness monster are a trifle against it. The bottom of the Black Sea is a real time bomb. Every year, the amount of hydrogen sulfide increases and approaches sea level. The concentration of this gas is currently too low to cause an explosion, but there is another gas on the sea floor that could lead to disaster. It is methane, a real detonator that can cause a terrible disaster at any time. #pandora_tv