They're (sometimes) big, they're hairy, and they're warm-blooded. From human being to moose and from cats to rats, bill Nye the Science Guy explains what it takes to be in the mammal family.

Caption title. Label title: Disney presents Bill Nye the science guy-- Mammals. Originally an episode of the television program Bill Nye, the science guy. Features: fully indexed "chapters" correlated to National Science Standards, interactive glossaries and quizzes, bonus footage of never-before-seen segments, interviews, and demos, on-disk implementation guide.