Takes you down into the murky world of sharks and their relatives, reveals what motivates these fascinating creatures, and dispels some myths about their behavior. Discover a shark that can fit in your hand and a shark that eats only plankton--and learn that not all sharks are killing machines.

Through the ages, man has depended on plants for everything from oxygen to food to building supplies. Gives a colorful tour of the world's most dazzling flora - from the most magical to the most bizarre. Watch buds burst, flowers bloom, and discover the myriad ways plants struggle to survive.

Take a flight of fancy with nature's most beguiling creatures. See their miraculous transformation from lowly caterpillar to airborne adult, and learn why these delicate insects have long inspired and entraced us.

Zoom in on a world of creatures that are industrious, sociable, and environmentally useful, but that are nevertheless avoided and ignored. Safely examine the wonders of the insect through macrophotography and startling 3-D graphics that reveal the true importance of these amazing life forms.

Takes you on a twisting journey down the great rivers of the world, pausing to visit the thriving realm of freshwater ponds. Travel upstream to find civilization's source - then down again to see the key to our very survival.

Learn about the forces inside the Earth that cause volcanoes to erupt and earthquakes to shake the landscape.

See how different types of weather form and the effect that climate has on our world. Part of the 'Eyewitness' video series.

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

A look at one of the world's most complex machines, capable of laughing, crying, and even reproducing itself.

Reveals the most amazing facts and folklore about our favorite furry animals. Towering or tiny, ferocious or friendly, mammals trot, hop, swim, and soar. Meet the creatures that make up this huge and varied family.