Three-quarters of Earth is an alien world, lying beneath the surface of the oceans. And although it encompasses over half of the world's species, we know more about the surface of Mars than the bottom of the ocean. It's only recently that science has penetrated this world, revealing extraordinary life forms and vast sweeping landscapes on a scale that defies imagination.
Publisher:[United States] : National Geographic, c2009.
General Note: English subtitles for the deaf and hard of hearing.For private home use only.Bonus program: Into the abyss."As seen on National Geographic Channel"--Container."See what lies beneath our seas"--Container.Title from container.
Creation/Production Credits Note: Editor, Peter Brownlee.
Participant or Performer Note: Narrator, Avery Brooks.