From the dangerous tarantulas on the forest floor to the high flyers in the canopy, spiders thrive on every level of this tropical rainforest. Starting on the ground and working the way up to the top, visit with and learn about a few of the 46 thousand species of spiders.
In the high Himalaya, yak-herder Thokmay Lowa and his small group steer his herd through one of the region's extreme mountain passes. For several months of the year, In the Canadian Arctic, traditional Inuit communities still forage for much of their food. 63-year-old Minnie Nappaaluk and her granddaughter Eva embark on one of the most hazardous expeditions for food Some Natural Wonders are threatened as never before - nowhere more so than the Brazilian Amazon. In the Mato Grosso, as a result of deforestation, the region's microclimate has changed. Now fires rage out of control in the dry season.
With every step towards the summit of the mighty Drakensberg, new species of exotic animals showcase the attributes that enable them to endure their harsh mountain home. Meet the sungazer, the intriguingly named suicide lizard, and other reptiles that inhabit South Africa's high-altitude terrain.
Mammals dominate the planet. They do it through having warm blood and by the care they lavish on their young. Weeks of filming in the bitter Antarctic winter reveal how a mother Weddell seal wears her teeth down keeping open a hole in the ice so she can catch fish for her pup. A powered hot air balloon produces stunning images of millions of migrating bats as they converge on fruiting trees in Zambia, and slow-motion cameras reveal how a mother rufous sengi exhausts a chasing lizard. A gyroscopically stabilised camera moves alongside migrating caribou, and a diving team swim among the planet's biggest fight as male humpback whales battle for a female.
While dogs are said to share more than 99 per cent of their DNA with grey wolves, recent research has indicated that this link might actually be the key to why dogs have become the perfect family pet. The pack mentality of their lupine ancestors remains in domestic dogs, inspiring what seems to be a fierce loyalty to their human families,
David Attenborough takes a breathtaking journey through the vast and diverse continent of Africa as it has never been seen before. (Part 3: Congo) The very heart of Africa is covered in dense tropical rainforest. The animals that live here find the most ingenious ways to carve out their space in a claustrophobic landscape. Danger lurks in every shadow, but some animals thrive here, from honey-stealing chimps to birds with a lineage as old as the dinosaurs, thundering elephants and kick-boxing frogs. Here in the Congo, no matter how tough the competition, you must stand up and fight for yourself and your patch.