Explores the forces that shape our planet and affect our lives, from hurricanes to volcanoes. Rare footage reveals the Earth at its most violent.

TREE roots out the most amazing facts about these silent sentinels of our hectic planet. Although they stand vulnerable to every attack from forest fire to fungus, they remain invincible. Whether tiny bonsai or giant sequoia, trees enrich every corner of our world.

Journey through space and time, witness the birth of the sun, travel to the outer limits of the solar system, and much more.

Investigates the most complex machine of all-- the human body. Explores the vital organs, and examines the instruments of the senses.