Filmed by Emmy Award-winning cinematographer Al Giddings, this timeless program takes a stirring look at the largest, tallest, longest-living things on the planet: trees. Stunning location footage captures the variety and the grandeur of the Pacific Northwest, the Florida Everglades, the Shenandoah Valley, and the Great Sonoran Desert. Quotations from Sierra Club founder John Muir and others who revere nature are interwoven with information on topics ranging from the function of forest ecosystems, to the effects of deforestation, to the integration of parks into urban landscapes.

The highest mountain range in the world, the Himalayan range is far reaching, spanning thousands of ...
This astounding documentary delves into the mysteries of the Tunguska event – one of the largest cos...

Every year, on the steppes of the Serengeti, the most spectacular migration of animals on our planet...

Ducks are true originals. There are more than 120 different species of ducks in all, a fantastical g...

Although first glance reveals little more than stones and sand, the desert is alive. Witness moving ...

Eugen Schuhmacher focuses on endangered and rare animal species such as the European bison and the N...

Drawing from never-before-seen footage that has been tucked away in the National Geographic archives...

This documentary follows the harsh and competitive life of Addo, a male lion born into a successful ...

A single tree that has witnessed events, a girl who loves Forough, and a boy who reads Sohrab.

A heartwarming story about a precautious, 8-year-old girl exploring the world with her globetrotting...

Scientists have discovered and investigate the reason behind the behavior of sharks swimming around ...

Crazy cat lady or world-class musician? You decide. Dorian Rence smashes our notions of what matters...

Wild rabbits share the sea cliffs on the island of Skomer, off the Pembrokeshire coast, with seabird...

A devoted pair of little owls set up home in an old orchard in rural Herefordshire. From spring blos...

Wildlife cameraman Gordon Buchanan travels to the frozen north, deep inside the Arctic Circle, to me...

People go and search for the legendary Bigfoot creature.

Two otters, a mother and daughter, are inseparable as the cub faces the dangers of her first Scottis...

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwi...