Part of the Eyewitness educational video series, which features simple discussions of scientific material one topic at a time for kids and parents, too, Eyewitness: Ocean examines the vital role of the ocean in global existence. Children learn that underwater ecosystems account for about 75 percent of the Earth's surface. Viewers also come to understand how the ocean helps keep mankind and mother nature functioning properly, round the clock. ~ Betsy Boyd, Rovi