See how different types of weather form and the effect that climate has on our world.

Discover the ancient myths that surround our oceans and the modern science behind them.

You will never look at twisting tornadoes, smashing hurricanes, and torrential thunderstorms the same way again.

Filled with cool characters, colorful images and fun sing-along songs, this DVD will engage your child from start to finish. Introduces over 100 practical vocabulary words, includes 6 complete lessons on everyday conversation.

Reveals the alien world of these often misunderstood cold-blooded vertebrates, uncovering reptilian facts that are stranger than fiction. From the hot, steam swamps to dry-as-bone deserts, travel the world in search of these amazing animals.

Instruction in English grammar explains the different roles that words play in sentences, including verbs, nouns, pronouns, adjectives, adverbs, prepositions, conjunctions, articles, and interjections.

Using specially developed camera lenses, Nova brings you the most intimate and most spectacular portrayal of a working bee colony ever filmed.

With all the noise around us, is our hearing really in danger? Dr. Know (Paul Trotman) enlists an audiologist to test sound levels around the home and at a heavy metal concert. He also tests out a variety of hearing protection to see which kind was most effective to prevent hearing loss due to loud noises. This DVD is geared more towards adolescents in grades 6-12 as a teaching tool about hearing.

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 entranced us.

A TV show about the Middle Ptolemies might be called "Lifestyles of the Rich and Murderous." With few exceptions, the members of this dysfunctional dynasty were violent, debauched, and generally neglectful of the country they ruled. The Egyptians hated them and frequently rebelled, forcing some to flee for their lives. With each Ptolemy, Egypt sank deeper, making a return to greatness impossible.