The Underworld: Journeys to the Depths of the Ocean

In a world of seven billion people, where every inch of land has been mapped, much of it developed, and too much of it destroyed, the sea remains the final unseen, untouched, and undiscovered wilderness, the planet’s last great frontier. There are no mobile phones down there, no e-mails, no tweeting, no twerking, no car keys to lose, no terrorist

In the three-dimensional world of the deep ocean, above and below matter as much as in front and behind.