More is known about the surface of the moon than the deep oceans on Earth, yet the sea constitutes two thirds of our planet.
The oceans are an integral part of our lives. Their influence dominates the world’s weather systems. They support an enormous range of life, from the largest whales to the smallest plankton, from hordes of sea birds to lonely, deep-sea fish. All this is governed by a complex system of biological and physical forces.
Each 50-minute programme peers into this watery world, with spectacular footage exploring shores and shallows teeming with life and uncovering unseen depths.
Chronicling the mysteries of the deep, coastline populations, sea mammals, tidal and climatic influences and the complete biological system that revolves around the world’s oceans, Blue Planet is the definitive exploration of the marine world.
Despite two-thirds of our planet being covered by water, the oceans and many of their inhabitants remain an unexplored mystery.
More people have walked on the moon than have travelled to the very depths of the ocean.
The open ocean is unimaginably immense and yet it's home to some of the fastest and most powerful hunters, playing a deadly game of hide-and-seek with their prey.
A look at the survival techniques of creatures that endure the harsh conditions of the Arctic and Antarctic.
This programme explores seasonal changes in the richest waters on Earth, where the annual cycle of the sun drives an explosion of life.
Amazingly beautiful, fragile and complex, coral reefs are adorned with spectacularly colourful life, but it's no tropical paradise.
This episode looks at how the tides create opportunities for marine life.
The boundary between land and sea is an exciting place, with animals constantly coming and going.