Sky Nature Today

The secrets of the most extreme sleepers of the animal kingdom, looking at how they deal with sleep deprivation and trying to discover whether animals dream

Part one of two. Investigating the reasons why young animals enjoy playing and how it can teach them to survive in the wild

Part two of two. The secrets behind animals' group games, revealing the benefits they gain from their playful behaviour

A look at some of earth's most dangerous creatures, from the world's most venomous snake to deadly marine creatures

Exploring more of earth's dangerous creatures, from the tiny frog that's packed with poison in South America to the world's most venomous spider, in Sydney, Australia

The story of Aztec warrior Popocatépetl - a giant active volcano - who erupts to wake his princess Iztaccíhuatl, a neighbouring ice-capped volcano

Steer clear of these alphas, whose horns, claws, and other protective gear keep them ready for battle, no matter what the weather dishes out

Come face-to-face with masters of stealth, from a sandhill crane as it leads in a deathly dance to a male brown hare as it throws swift punches at its beloved

Documentary following a young male brown bear on his adventures in a mountain range that forms a natural border between Slovenia and Austria

Communication in the animal world, beginning with the secrets of body language

The remarkable ways that animals speak to one another, from the trumpeting of enormous elephants to the chatter of seal colonies

Through sense, scent and sight, animals can communicate in ways that are outside of the reach of humans. Here, scientists dig further into their secrets

The shark, one of nature's oldest and deadliest predators, exploring how this ancient hunter adapts, endures and strikes with unstoppable precision

Part one of two. The naturalist explores the origins of life on Earth, explaining how newly discovered fossils have transformed scientists' understanding of the first organisms

Part two of two. The naturalist explores how evolution gained pace once creatures developed mouths and mobility, and reveals how animals began surviving on dry land

Part one of two. A look at the marsupial native only to the Australian island, revealing how the mating season is a chance for males to show who is dominant

Tasmanian Devils might have infamous reputations, but these spirited scrappers are committed parents and heroic defenders of their pouch-reared young

The shark, one of nature's oldest and deadliest predators, exploring how this ancient hunter adapts, endures and strikes with unstoppable precision

Discovering a world shaped by fire and water, as cameras capture Philippine eagles soaring above ancient forests and rare crocodiles lurking below the river's surface

Cameras follow turtles and tiger sharks roaming volcanic reefs, and tarsiers leaping through forests on the hunt

Life in Florida's Everglades, beginning with the season of drought, when predators and prey are pushed dangerously close together

The rainy season in the Florida Everglades, a stark contrast to the dry winter which preceded it, as the 600-plus animal species expand both their hunting and breeding grounds

A documentary about the largest groundwater reservoir in Europe, which forms an underground river in the Upper Rhine Valley

Profiles of the world's most spectacular marine habitats, beginning with the Caribbean island of Bonaire, a leading destination for eco-tourists

Efforts to protect three important Florida Keys habitats, including crucial coral reefs and the swampy homes of endangered birds

The vets focus on the lives of the park's zebras. First on the agenda is the endangered Grevy's zebra, which must be isolated to encourage breeding

A vet is leaving the park after eight years, and for their last job is organising the team for a daunting relocation of around 500 animals. It requires a massive effort