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.
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.
When it's time to haul ashore for breeding, mating and raising young, marine mammals return to island beaches.
Antarctica was once in the centre of supercontinent Gondwana. Traces of these connections remain in its plants and marine life.
Every animal in Antarctica answers the call of the seasons. The continent itself is vastly different in summer and winter.
Even in the coldest, driest and most inhospitable place on Earth, life finds a way to survive - and thrive.
There are 25,000 islands in the vast Pacific Ocean. Each one fosters its own ecology with unique rules and behaviours.
With added facts. A bottlenose dolphin has a raspy voice and needs to see the doctor to get the all-clear.
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