In the Pacific, the quest to multiply has spawned a stunning array of unusual behaviors and adaptations. There are forest penguins with a tenuous marriage, the secret rendezvous of great white sharks, and the tale of male pregnancy.
An elaborate river portrait-in this case of one of the greatest rivers of Europe. An epic journey of discovery into the continent's unknown wild lands, "Danube - Europe's Amazon" shows how the river's famous currents helped sculpt the incredible landscapes, and it links them together.
Take a nerve-wracking dive with great white sharks as they feast on millions of sardines that fall into their trap; it’s one of the most spectacular underwater phenomenons on the planet! Plus you’ll get to patrol reefs with vigilant soldierfish, dance with balletic jellyfish and more!
The Taiga forest, on the edge of the Arctic, is a silent world of stunted conifers. The trees may be small but filming from the air reveals its true scale. A third of all trees on Earth grow here and during the short summer they produce enough oxygen to change the atmosphere.
The episode begins in the South American rainforest whose rich variety of life forms is used to illustrate the sheer number of different species. Since many are dependent on others for food or means of reproduction, David Attenborough argues that they couldn't all have appeared at once. He sets out to discover which came first, and the reasons for such diversity. He starts by explaining the theories of Charles Darwin and the process of natural selection, using the giant tortoises of the Galapagos Islands (where Darwin voyaged on HMS Beagle) as an example. Fossils provide evidence of the earliest life, and Attenborough travels a vertical mile into the Grand Canyon in search of them.
Andrew Scott narrates a special programme which celebrates winter and explores how animals and plants rise to the challenges it brings. With their world encased in snow and ice, animals must find the most inventive ways to survive and even benefit from the cold. Caribou become ice road travellers as it gets slippery underfoot, stoats make their own fur bedding, and snow monkeys find a warm bath. Emperor penguins are built for the cold weather, but even they must find their own tricks to endure the world's most savage winter.