Oceans cover 70 per cent of the Earth's surface. Ocean-based ecosystems are a major food source, ocean seafloors are expected to be the major source of new resources needed in the new millennium, and ocean chemistry and current systems are as important as the atmosphere in controlling the world's climate. Yet the oceans, particularly the ocean depths, are the least known part of our world. The following two articles offer glimpses into research being conducted to improve our understanding of planet Earth.
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