Planet Earth

E01▶

From Pole to Pole

Mar 5, 2006 · 53m

E02▶

Mountains

Mar 12, 2006 · 49m

E03▶

Fresh Water

Mar 19, 2006 · 51m

E04▶

Caves

Mar 26, 2006 · 50m

E05▶

Deserts

Apr 2, 2006 · 50m

E06▶

Ice Worlds

Nov 5, 2006 · 51m

E07▶

Great Plains

Nov 12, 2006 · 50m

E08▶

Jungles

Nov 19, 2006 · 51m

E09▶

Shallow Seas

Nov 26, 2006 · 51m

E10Playing

Seasonal Forests

Dec 3, 2006 · 51m

E11▶

Ocean Deep

Dec 10, 2006 · 53m

Trees are Earth's largest organisms and are also one of the planet's oldest inhabitants. Seasonal forests (unlike tropical rain-forest) are the largest land habitats. A third of all trees grow in the endless taiga of the Arctic north. Northern America has forests that include California's sequoias, the Earth's largest trees. There and elsewhere, their vast production of photosynthesis and shade presides over a seasonal cycle of life and involves countless plant and animal species.