The seas are life's laboratory. We can trace our origins all the way back to our marine way of life. Our basic blueprint of a brain, backbone, two legs and two arms was created in the ocean.

Chapters: Sea Turtles: Survival of the Fittest Fish and Human Embryo Life From the Sea Largest Animal on Earth Ancestral Flatworm Snail Evolution Competition and Explosion of Life Jawless Hagfish andSharks Sharks: High Tech Predators Giant Pacific Octopus Fish: Brainsand Bones Undersea Adaptations Life From the Seas