Penguins • 2017 • episode "3/6" • Wildlife

5:27

Our planet was once populated by megafauna, big top-of-the-food-chain predators that played their part in balancing our ecosystems. When those megafauna disappear, the result is a "trophic cascade," where every part of the ecosystem reacts to the loss. How can we stay in balance? George Monbiot suggests rewilding: putting wolves, lions and other predators back on top -- with surprising results.

TED-Ed • Nature

58:40

David Attenborough takes a breathtaking journey through the vast and diverse continent of Africa as it has never been seen before. (Part 2: Savannah) East Africa is a land which is constantly changing. To survive here, creatures must be able to deal with unpredictable twists and turns - wet turning to dry, feast to famine, cold to hot - no matter how hostile it becomes. From dense forests to snow capped peaks, steamy swamps and endless savannah, this unique and varied land is also a haven for life, supporting large animals in numbers found nowhere else on Earth. But away from the familiar, forever-travelling herds, there are a huge cast of other characters - lizards that steal flies from the faces of lions, vast dinosaur-like birds who stalk catfish through huge wetlands, and an eagle who risks everything on the arrival of ten million bats from a far off rainforest.

2/6 • Africa • 2013 • Nature

46:27

Across the 3,000 scattered islands of the Bahamas lie visions of unexpected wonder. Experience its unique natural marvels-from towering pine forests to tangled mangrove swamps, to a mysterious labyrinth of underwater caves.

6 • Great Blue Wild • 2017 • Nature

28:41

The final episode explores dinosaurs' extraordinary ability to survive. Featured dinosaurs include the bizarre magyarosaurus, which lived in the shadow of the biggest flying animal - hatzegopteryx - and showed an amazing adaptation to island life; and the weird nothronychus, a carnivore that gave up meat eating. This astonishing capacity to evolve into ever more diverse and bizarre forms meant that dinosaurs not only spread throughout the world, but also dominated life upon it for more than 160 million years. It was only an unprecedented extraterrestrial event that finally saw the end of planet dinosaur.

6/6 • Planet Dinosaur • 2011 • Nature

46:23

On the rocky southern tip of Africa lies a narrow peninsula held hostage by the elements. From pounding ice-cold waves to relentless sun, the extreme conditions demand toughness and adaptability from its resident wildlife.

1/4 • Coastal Africa • 2016 • Nature

48:03

The sea turtle is one of the oldest animals on Earth. These ancient mariners pre-date the dinosaurs and have existed for over 100 million years, but now all seven of the surviving species are endangered.

5/5 • Arabian Seas • 2018 • Nature