Gr 8 Up—Narrated by David Suzuki, this program details the origins of the Earth's oceans, and therefore life on our planet. Scientists explore the oceans of today to find clues that will help them understand how life began there. Viewers visit Australia's stromatolites which were abundant three billion years ago and provided food and oxygen for life on Earth, but are rare today. Submersibles explore the deep sea vent ecosystems that exist without sunlight. Computer animation shows an artist's conceptualization of the world's molten formation. An interesting film for students studying the development of life on Earth.—Ryan Henry, Daviess County Public Library, Owensboro, KY
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