How do trees grow? Can trees get sick? If a tree falls in the woods ...? Kellyn & Co come up with answers to questions about trees.
With every disaster that could befall humanity in mind, Stephen Hawking explains why we need to colonise another planet — and how.
Join us at Taronga Zoo in Sydney for a documentary series narrated by Naomi Watts. The series provides a look behind the scenes at what it takes to run one of the world's most famous and magnificent zoos.
The true story of a family of charismatic quolls living on an abandoned farm in Tasmania, and one man's extraordinary devotion to save them.
Australia has more than 35,000km of coastline that can be a stranger merger of soil and sea, rainforest and reef.
When five great white sharks wash up dead on South African beaches, the necropsy reveals they were eaten alive. Cinematographer Andy Casagrande attempts to track down the killer.
After great whites, known as 'air jaws', vanished from their hunting grounds in South Africa, photographer Chris Fallows and filmmaker Jeff Kurr seek a new location in New Zealand.
Shark experts return to Plettenberg, South Africa with new technology: a 'drone-towed' seal decoy to study and capture the harrowing and dramatic battles between shark and seal.
A look at the true story of the rise of Ngogo, Uganda's warrior chimpanzees over a 20-year period. How did they establish the largest troop of chimps ever discovered?
Australia's semi-coastal interior is lush and varied, with many extraordinary landscapes and wildlife found nowhere else on Earth.
At Georgia Aquarium, every birth, egg laid or hatched is very special to its staff. These meaningful experiences enrich the lives of the team who care for these animals and the guests who visit each day.
A curious and active box turtle goes for his daily walk and two wobbegong sharks are due for a check-up. Plus, the staff prepare for puffin breeding season.
Nandi, the aquarium's smallest manta ray, is due for her annual check-up, and some young ruddy ducks arrive at the aquarium and are introduced to their new habitat.
Two African penguins have been together for 25 years, but one is now having problems with his eyes. Plus, a piranha needs surgery on his mouth.
Australia is home to some of the world's most ancient and ecologically diverse rainforests.
Trainers get two rescued sea lions ready for eye surgery. Meanwhile, intelligent giant octopus Ophelia needs attention, and the team head to the Bahamas.
The world's best-known natural history broadcaster, Sir David Attenborough, journeys back in time and across the globe to discover how the earliest animals developed on our planet.
A sea otter is rushed to the health centre. Plus, the team are in Key Largo to help the coral restoration project, and Scarlett the sea lion is trained.
After six years away, Mek the tiger returns to the Zoo. Two shy tree kangaroos, Spike and Polly, meet for the first time. With the Children's Zoo under construction, the keepers have to move over 100 animals.
With little rainfall and temperatures soaring above 50 degrees Celsius, Australia's vast interior is an unrelenting habitat.
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