A passionate and inspiring look at former Vice President Al Gore's campaign to expose the myths and misconceptions of global warming, and to create public awareness on the subject.

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

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

Takes you deep into the waters of the world to discover some of the most exotic creatures in nature. Take the plunge from dazzling coral reefs to the darkest depths to meet fish - a vast and varied group of animals.

Takes you soaring through the sky and around the world in an exciting journey from the bird's distant dinosaur past to its present astonishing variety. Take an up-close look at the staggering range of sizes, shapes, and habitats of these creatures.

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.

"It is the dark ages of medieval Europe. Warrior peoples live in small groups huddled around the misty shores of the northern seas. There are bloodthirsty monsters in these lands, but there is also a great hero. His name is Beowulf"--Container.

12 lectures delivered by Professor Richard Wolfson, Middlebury College, Vermont.

"Quantum mechanics gives us a picture of the world that is so radically counterintuitive that it has changed our perspective on reality itself, raising profound questions about concepts such as cause and effect, measurement, and information. Despite its seemingly mysterious nature, quantum mechanics has a broad range of applications in fields such as chemistry, computer science, and cryptography. Quantum Mechanics gives you the logical tools to grasp...

Chapter, summaries, analyses, pop quizzes, interactive study of the work.