DVD

Oceans provide habitats for millions of marine species and cover more than 70 percent of the Earth's surface. Segments detail seafloor maps, the role of water in our planet's life cycles, three states of matter, and the crucial balance among all life-forms.

Segment 1: Geologic Time (6 min.) Learn how absolute and relative times help scientists examine the Earth's age, as well as prehistoric life forms. Segment 2: Prehistoric Life (4 min.) Discover how fossils are formed and see the clues they give scientists to learn details about prehistoric life and the history of our planet.

Segment 1: (6 min.) Life Cycles - All organisms undergo cycles of life. Learn about the life cycles of several animals, including reproduction. Segment 2: (5 min.) Heredity - Learn about genes and heredity and discover the genetic connection between modern birds and ancient dinosaurs.

Contains footage of the wreckage of two famous ships describing the skills and techniques used in underwater forensics.