55:38
The living planet : a portrait of the earth: the open ocean
Over 70% of the Earth's surface is covered by sea. This program looks at the oceans in their broadest aspects - from drowned plains and hidden mountains to minute drifting plankton and forests of kelp. The food webs of the oceans and the evolution o...
46:28
Climate Change 1: The Arctic Odyssey
The Arctic is warming up twice as fast as the rest of the planet; its frozen world is one of the last refuges of the unknown land on Earth and the Arctic, as we know it, is, literally, disappearing. Under the threat of global warming, this vast expa...