From the food on our tables to the fuel in our cars, crude oil seeps invisibly into almost every part of our modern lives. Yet many of us have little idea of the incredible journey it has made to reach our petrol tanks and plastic bags from its origins millions of years ago.
The undercover cameras reveal how animals rely upon each other for a range of activities. Arctic wolves group together to survive in one of the harshest landscapes on earth, a band of hungry mongoose groom warthogs for tasty morsels - before turning their attention to Spy Warthog - and fish help clean hippos' bodies, as well as providing a unique dental service. Meanwhile, crocodiles and dikkop birds take part in a mutual neighbourhood watch against hungry prowling monitor lizards, and Spy Rattlesnake captures how prairie dogs and burrowing owls use their language skills to tell the rest of their community of approaching danger.
Our body is a true time machine. It is a mirror of the history of the living world. If an engineer today had to fabricate the ideal human, he would most likely not design us the way we are currently made. He would go to the most logical, the most efficient, the most rational; and when you look closely, this is not always what characterizes us.
Fortey travels to the rainforests of Madagascar - an ancient island that has spawned some of the most extraordinary groups of plants and animals anywhere in the world. From beautiful Indri lemurs, toxic frogs, and the cat-like giant mongoose called the fossa, to evolutionary oddities like the giraffe-necked weevil and the otherworldly aye-aye, he uncovers the secrets of the evolutionary niche - examining how, given millions of years, animals and plants can adapt to fill almost any opportunity they find.
Across our planet, there are a handful of places that truly astonish, like Mount Everest, the Grand Canyon and Victoria Falls. These wonders seem to have little in common other than - literally - taking your breath away. But they share one other thing: they pose extraordinary challenges for their inhabitants. The second of two documentaries profiling some of the world's most expansive - and inhospitable - landscapes, and the people who live there. A fisherman in Zambia faces off against crocodiles and risks being swept to his death as he tries to make a living above the imposing Victoria Falls, and in the Amazon, a giant fish offers salvation to a hungry family that calls the river home. A boy's future hangs on the outcome of a single horse race in the vast grasslands of the Steppe, and in a European salt marsh, a young man duels with a savage bull in a centuries-old battle of wills.
Nine miles off the coast of Oman, a zebra shark scans the ocean floor for crustaceans, while a menacing giant stingray floats by. Soon, night becomes day and new killers emerge, from toxic scorpion fish to crown-of-thorns starfish, both bringing coral devastation. Dive among these deadly marine carnivores.