The Incredible Journey of the Monarch Butterfly

An examination of the extinction threat faced by frogs, which have hopped on Earth for some 250 million years and are a crucial cog in the ecosystem. Scientists believe they've pinpointed a cause for the loss of many of the amphibians: the chytrid fungus, which flourishes in high altitudes. Unfortunately, they don't know how to combat it. Included: an isolated forest in Panama that has yet to be touched by the fungus, thus enabling frogs to live and thrive as they have for eons.

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.

Every year, thousands of Antarctica's emperor penguins make an astonishing journey to breed their young. They walk, marching day and night in single file 70 miles into the darkest, driest and coldest continent on Earth. This amazing, true-life tale is touched with humour and alive with thrills. Breathtaking photography captures the transcendent beauty and staggering drama of devoted parent penguins who, in the fierce polar winter, take turns guarding their egg and trekking to the ocean in search of food. Predators hunt them, storms lash them. But the safety of their adorable chicks makes it all worthwhile. So follow the leader... to adventure!!

Trek into the hidden battlefields of northern Botswana where lions and spotted hyenas clash in overlapping territories. With never-before-seen footage, much of it filmed at night, you'll uncover an intense and vicious blood feud that has been waged for millennia. Follow the Southern Clan, led by a powerful hyena matriarch whose firstborn female cub kills her sister at birth to assure her succession as leader of the clan. Lurk in the shadows as a lioness from the Central Pride gives birth to three cubs and then encounters a deadly Egyptian cobra. You'll be stunned by breathtaking chase scenes as the hyena matriarch is brutally killed by a male lion, throwing the clan into chaos. Discover nature's savage conflicts in this ancient rivalry.

Genuine connections between children and nature can revolutionize our future. But is this discovery still possible in the world's major urban centers? The new chapter of "The Beginning of Life" reveals the transformative power of this concept.

National Geographic filmmakers, Dereck and Beverly Joubert, explore how some animals are thrust together by the forces of nature-sometimes through a millennium of evolution or even last year’s drought. In the aftermath of strange elephant deaths, they piece together a visually stunning story that confirms their theory that lions were hunting elephants. Narrated by Jeremy Irons.

Costa Rica's motto is Pura Vida - Pure Life - and this deceptively small country is bursting with some of the most spectacular wildlife and pristine ecosystems in the world. All this diversity thrives, in part, thanks to one surprising little creature: hummingbirds. Venture across Costa Rica's wild and rugged landscapes, from volcanic peaks to coastal jungle to misty cloud forests and discover the nation's dazzling diversity of hummingbirds. Watch how these tiny birds play an outsize role in maintaining some of the richest and wildest environments on Earth, where a whole community of creatures, such as macaws and monkeys, enjoys The Hummingbird Effect.

After one of the hottest years on record, Sir David Attenborough looks at the science of climate change and potential solutions to this global threat. Interviews with some of the world’s leading climate scientists explore recent extreme weather conditions such as unprecedented storms and catastrophic wildfires. They also reveal what dangerous levels of climate change could mean for both human populations and the natural world in the future.