Perspective: Understanding Oceans (1999)

Run Time - 30 min.  |  
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The world's oceans are an invaluable resource for food, energy, and minerals, and are part of the water cycle essential to life on Earth, as discussed in Perspective: Understanding Oceans. The study of the seas has been hampered by an inability to penetrate into its depths, but advancements in technology have enabled scientists to venture much farther than before. Devices capable of transporting researchers into deep waters have allowed them to study ocean life never seen before, and to bring back samples of sea creatures that may hold the answers to medical and environmental problems on land.