Metamorphosis seems like the ultimate evolutionary magic trick - the amazing transformation of one creature into a totally different being: one life, two bodies. From Ovid to Kafka to X-Men, tales of metamorphosis richly permeate human culture. The myth of transformation is so common that it seems almost pre-programmed into our imagination. But is the scientific fact of metamorphosis just as strange as fiction or... even stranger? Filmmaker David Malone explores the science behind metamorphosis. How does it happen and why? And might it even, in some way, happen to us?
Grasslands cover one quarter of all land and support the vast gatherings of wildlife, but to survive here animals must endure the most hostile seasonal changes on the planet. From Asia's bizarre-looking Saiga antelope to the giant anteaters of Brazil, grassland animals have adapted in extraordinary ways to cope with these extremes. In the flooded Okavango, lions take on formidable buffalo in epic battles, on the savannah bee-eaters take advantage of elephants to help catch insects and, on the freezing northern tundra, caribou embark on great migrations shadowed by hungry Arctic wolves.
In this episode Brian uncovers how the stunning diversity of shapes in the natural world are shadows of the rules that govern the universe. In Spain he shows how an attempt by hundreds of people to build the highest human tower reveals the force that shapes our planet. In Nepal, honey hunters seek out giant beehives that cling to cliff walls. The perfect hexagonal honeycombs made by the bees to store their honey conceal a mathematical rule. Off the coast of Canada, Brian explains how some of the most irregular, dangerous shapes in nature - massive icebergs that surge down from Greenland and into shipping lanes of the Atlantic - emerge from a powerful yet infinitely small force of nature. Even the most delicate six-sided snowflake tells a story of the forces of nature that forged it.
In the final film, he reflects on the dramatic impact that humankind has had on the natural world within his own lifetime. He tells the surprising and deeply personal story of the changes he has seen, of the pioneering conservationists with who he has worked - and of the global revolution in attitudes towards nature that has taken place within the last six decades. In a journey that takes him from the London Zoo to the jungles of Borneo, Attenborough reveals what inspired him to become a conservationist. He remembers classic encounters with mountain gorillas, blue whales and the giant tortoise, Lonesome George. These are all characters that have helped to change public attitudes to the natural world.