Pravda: Fish and aquatic mammals will become first victims of oxygen hunger. Gary Schaffer of Denmark’s Niels Bohr Institute and his Chilean colleagues modeled the evolution of the earth’s ecosystem. The scientists predict the extinction of many ocean dwellers, whereas the disruption of the biological balance will trigger a global catastrophe. Millions of dead sea animals will float on the water surface, and only tiny creatures and herbal organism will survive at ocean depths. The scientists …