Brothers in Blood: The Lions of Sabi Sand

What if there was a museum that contained every type of life form in the universe? This experience takes you on a tour through the possible forms alien life might take, from the eerily familiar to the utterly exotic, ranging from the inside of the Earth to the most hostile corners of the universe. New research is upending our idea of life and where it could be hiding: not just on Earth-like planets, where beings could mimic what our planet has produced, but in far flung places like the hearts of dead stars and the rings of gas giant planets. Nowhere in the universe is off limits. Only when we know what else is out there will we truly know ourselves. This thought experiment will give us a glimpse into what could be out there, how we might find it, and just how far nature’s imagination might stretch.

In this wildlife drama, a worsening dry season in the Kalahari Desert leaves prides, packs and herds to rely on the power of family to survive.

A look at the state of the global environment including visionary and practical solutions for restoring the planet's ecosystems. Featuring ongoing dialogues of experts from all over the world, including former Soviet Prime Minister Mikhail Gorbachev, renowned scientist Stephen Hawking, former head of the CIA R. James Woolse

"The Silent Alps" explores a forgotten massacre that is widely unknown in the modern era, the history of Kea culling in New Zealand

In Sekenani River in Maasai Mara Park, a pod of hippopotamuses and a bask of crocodiles keep a cautious truce.

On Botswana's Linyanti Plains, a band of brothers reigns amongst the top predators: three cheetahs - partners since birth and one of the most efficient hunting forces on the plains - until tragedy strikes. Achilles, the hunt leader of the brotherhood, is killed by a cobra bite, leaving his brothers Odin and Shiva to fend for themselves. With their coalition diminished they must adapt fast: learning to hunt as a twosome and defend their kills without the help of Achilles. Confounding their efforts is a host of predators: an injured leopard, a cunning hyena and a devious black-backed jackal. Making matters worse, a lone male cheetah begins to trespass on their land. Will these cheetah blood brothers survive the overwhelming odds stacked against them?

Set in the vast expanse of South Africa's Mala Mala game reserve, a host of Africa's biggest and fiercest wildlife species compete for food, mates and territory against the backdrop of a harsh dry season.

A documentary that focuses on how animals born with unusual colours have a much harder struggle than normal. Follow white lions, a white baboon and a yellow crocodile.

Ever since there’s only one male northern white rhino remaining on earth, armed bodyguards protect him, tourists are standing in line to make a selfie with him, journalists rush to Kenya to tell his story and scientists are determined to find ways to reproduce his species. What is so attractive about the threat of extinction? How does this reflect on us?

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.