What lies below the frozen Arctic ice-sheets? Or in the black holes under the Caribbean Sea?

The oceans are Earth's single most important feature. They shape our climate, our culture, our future. Yet we know more about the surface of Mars than we do about Earth's watery depths.

Professional diver and explorer Paul Rose reveals an astonishing hidden world of lost cities, forgotten shipwrecks, underwater caves and submerged volcanoes. he also looks at the inhabitants of the ocean habitat, from great white sharks to the myriad exotic, but rarely seen, life forms that thrive in the extreme conditions miles beneath the surface. Cutting-edge techniques will reveal the ocean as it's never been seen before.

Beautifully illustrated with more than 150 colour photographs. Includes the Mediterranean, the Sea of Cortez, the Indian Ocean, the Red Sea, the southern Ocean and the Arctic Sea. Accompanies landmark BBC series.

What lies below the frozen Artic ice-sheets? Or in the black holes under the Caribbean Sea?