These are the 10 most-streamed new FRONTLINE documentaries of 2025 — and they're all streaming for free at pbs.org/frontline, on YouTube and in the PBS App.

Currently, there are eight living species of bear around the world: Polar bear, Brown bear, Black bear, Andean (Spectacled) bear, Panda bear, Himalayan (Moon) bear, Sloth bear, Sun bear. Bears are ...

Beyond its iconic height, the Redwood Forest is sacred to the Yurok Tribe and a scientific frontier for the study of vast biodiversity that exists nowhere else on Earth. This episode of Untold Earth ...

Explore a massive collection of thought-provoking documentaries, including exclusive films from Ken Burns. Sometimes I like taking a break from all my scripted shows to watch something a little ...

In the Atchafalaya Basin—the largest river swamp in the U.S.—ancient cypress trees act as natural barriers against hurricanes and extreme weather. Spanning a million acres, these nearly indestructible ...

Dr. Carlos Jaramillo of the Smithsonian Tropical Research Institute shares the incredible story of the Titanoboa, a colossal snake that lived 60 million years ago. He explains how its fossils were ...

The shimmering dunes of White Sands National Park harbor an extraordinary secret: fossilized human footprints that suggest human presence in the Americas as much as 10,000 years earlier than ...

City dwellers besieged by pigeons on their terraces, balconies, rooftops, parks, public squares and sidewalks may or may not appreciate a new episode of PBS’s “Nature” that reveals the inner lives of ...

Where typical ocean tides average about three feet, the Bay of Fundy’s record-setting tides soar over 50. This means 160 billion tons of water rush through the bay twice every day, generating enough ...