In "Comets and Meteors" more than just high-speed space chunks, comets and meteors carry important information about the history of our Universe. In fact, the Earth's impact with comets and meteors may have created the oceans, caused the extinction of the dinosaurs, and even brought life to Earth! The DVD has extra features: fully indexed "chapters" correlated to national science standards, interactive glossaries and quizzes, bonus footage of never-before-seen segments, interviews and demos, Spanish translation, and on-disk implementation guide. .