The savannah is home to some of the greatest herds on Earth, and in this episode, Wild Africa brings you close encounters with these animals. The savannah is Africa's youngest landscape, shaped by the weather and the animals themselves as the continent dried. It is now home to baboons, wildebeest, lions, cheetah, and aardvarks who must struggle through the eight-month dry season to survive.
This episode is devoted to the evolution of reptiles. They are not as restricted as their amphibian ancestors, since they can survive in the hottest climates. The reason is their scaly, practically watertight skin. The scales protect the body from wear and tear and in the case of some species of lizard, such as the Australian thorny devil, serve to protect from attack. The horned iguana from the West Indies is also one of the most heavily armoured. The skin is rich in pigment cells, which provide effective means of camouflage, and the chameleon is a well-known example. Temperature control is important to reptiles: they cant generate body heat internally or sweat to keep cool.
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.
For nearly 4 billion years, the continents of Earth were a lifeless wasteland. But beneath the sea, our planet was teeming with life. Many strange creatures evolved, from eel-like conodonts to voracious cephalopods, until nearly all life was wiped out in our planet’s first mass extinction.
From the mighty grizzly bear to the endearing real life Paddington, the spectacled bear, and Rudyard Kipling’s Jungle Book's Baloo, the sloth bear, this remarkable animal family has long captured our imagination. As some of the largest animals on earth, they need more than just the 'bare necessities' to survive - especially in today’s ever-changing world. This film explores how bears across the world have overcome the challenges of life - from finding food and raising the cubs to confronting rivals and habitat loss - all thanks to brains, brawn and a remarkable ability to adapt.