When Whales Walked: Journeys in Deep Time • 2019

54:17

The episode begins in the South American rainforest whose rich variety of life forms is used to illustrate the sheer number of different species. Since many are dependent on others for food or means of reproduction, David Attenborough argues that they couldn't all have appeared at once. He sets out to discover which came first, and the reasons for such diversity. He starts by explaining the theories of Charles Darwin and the process of natural selection, using the giant tortoises of the Galapagos Islands (where Darwin voyaged on HMS Beagle) as an example. Fossils provide evidence of the earliest life, and Attenborough travels a vertical mile into the Grand Canyon in search of them.

1/13 • Life on Earth • 1979 • Nature

52:28

Explore the remarkable survival strategies of plants as they adapt, defend, and thrive in ever-changing environments.

S1E2 • The Secret Genius of Plants • 2024 • Nature

41:14

On a small island, a monumental display takes place as the giant Hatzegopteryx reveals his gentler side to woo a mate

S2E1 • Prehistoric Planet • 2023 • Nature

87:56

Discover the evolutionary secrets of some of the world’s most majestic creatures. From voracious crocodiles and acrobatic birds to stupendous whales and majestic elephants, WHEN WHALES WALKED follows top scientists on a global adventure as they follow clues from the fossil record and change what we thought we knew about the evolution of iconic beasts.

2019 • Nature

58:58

David Harewood narrates a documentary exploring three of the most exotic and remote islands on the planet, beginning with the unique and extraordinary wildlife of Madagascar. As the oldest island on Earth, life has had time to evolve and there are now more unique plants and animals on Madagascar than any other, with footage of ring-tailed lemurs, labord's chameleons and Decken's sifakas.

S1E1 • Earth's Tropical Islands • 2019 • Nature

59:14

Simon Reeve treks and canoes through Canada’s rugged and frozen Yukon Territory to meet the people who make the wilderness home and to search for grizzly bears, the apex predator.

S2E3 • Wilderness with Simon Reeve • 2026 • Nature