The story of an idea as uniquely American as the Declaration of Independence and just as radical: that the most special places in the nation should be preserved, not for royalty or the rich, but for everyone. Now streaming.

How were Easter Island’s giant stone heads made? New research challenges the idea that their construction led to environmental and social collapse – and uncovers surprising clues about the origins, innovations, and resilience of the Rapanui people.

A spectacular fossil graveyard reveals a 43-million-year-old whale that had four legs and could walk. Follow scientists as they search for new clues to how mammals moved from land into the sea to become the largest animals on Earth.

In Madagascar’s Kirindy Forest, a matchstick-sized chameleon goes on an epic journey through high trees and ground floors to find a mate and lay eggs before it’s too late. A water vole in the Scottish Highlands swims a lake, climbs a waterfall and scales a mountain also to find a suitor and a place to raise her pups.

In Taiwan, a Formosan pangolin travels through a land of giants to find a mate in a protected forest, while in Brazil’s Atlantic Forest, a family of golden-headed lion tamarins journey from the edge of their world into a land of plenty.

In Canada, a walnut-sized turtle ventures through a forest of giants, dodging huge trucks along the highway. The newly hatched turtle is in search of the lake where she will spend the next 50 years of her life. In South Africa, a young bushbaby is expelled by his family and must journey into the unknown to find a new home. He is drawn toward the lights of the human world in the city of Pretoria.

In this 1979 Pau Hana Years episode, we visit Po‘ipū, Kaua‘i at Waiohai Hotel just before it closes.

Join scientists on the biggest Arctic research expedition of all time. Facing hungry polar bears, perilous sea ice cracks, and brutal cold, the team strives to understand the forces that are changing the region—and the world—forever.

In the Path of Kīlauea witness the power and beauty of Kīlauea Volcano on Hawaiʻi Island in this 1990 Spectrum Hawaiʻi episode.

A celebration of one of Earth’s most iconic and beloved birds, featuring all 18 species of penguins for the first time, from New Zealand, Cape Town, the Galapagos Islands and Antarctica