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.
In the small African kingdom of Swaziland, the black mamba is a snake both feared and revered. During summer, these elegant yet lethal snakes turn up everywhere -- in homes, schools and cars - and people are bitten every week. Enter Thea Litschka-Koen, a mum and hotel manager who has become known affectionately as the white witch. She and her husband are on call 24 hours a day to rescue and release black mambas when they get too close for comfort.
When you step ashore, with a keen eye you spot one of these snakes roughly every 10 to 15 minutes after clearing the base of the island, and as many as one every six square yards in other parts of the island. This means, as you are walking through the waist-high brush, even with some good boots on, it's like walking through a minefield that moves and, instead of blowing you into chunks, slowly paralyzes you and liquefies your insides, as the golden lancehead does to the migrating birds it feeds on in the treetops.
Explorer and primatologist Mireya Mayor, journey deep into the unforgiving jungle to uncover the secrets of these mysterious giants.
NATURE's Encountering Sea Monsters does just that, as underwater cameraman Bob Cranston explores the remarkable world of marine creatures called cephalopods. Cephalopods include squids, cuttlefish, octopi, and nautili.
The Earth's climate has suffered successive changes which have determined the number and variety of species in each period. The concept of biodiversity specifically refers to the richness of life in a determined time and space. It's a calculation that measures the variety of species, keeping in mind that those species are capable of reproducing among themselves. There is little difference between insects, plants and mammals because every living being counts... and not only because it's alive but because life also depends on it.
Yet these are not easy questions to get answers to. The mainstream media and the internet are full of conflicting viewpoints & information. For example, UN scientists have already claimed that the health impacts of Fukushima will be negligible and statistically insignificant, which is parroted in CNN's documentary "Pandora's Promise". However independent scientists tell a very different story; they project on the order of a million cancers within the next few decades in Japan alone.
Sarnia is home to more than 60 refineries and chemical plants that produce gasoline, synthetic rubbers, and other materials that the world's industries require to create the commercial products we know and love. The city's most prominent and profitable attraction is an area about the size of 100 city blocks known as the Chemical Valley, where 40 percent of Canada's chemical industry can be found packed together like a noxious megalopolis.
More than a century of technological developments have made a reality of Jules Verne's fantasy. Today, submarines large and small crisscross the deep ocean. But compared to the Nautilus, in one important respect, real-life subs are a bit of a disappointment: they don't have much of a view.
It is a crocodile heaven and a young male crocodile feasts on the local bounty. Greedy for the easy pickings he follows the shoals of fish into unfamiliar waters and unintentionally begins an extraordinary journey. Many dangers lie ahead. He ventures far from his birthplace and swims into a series of strange habitats, very different from where he was born. Extraordinary creatures inhabit the waterways. Predators prowl everywhere.