Why are there so many types of mammals? Mammals are the most highly developed vertebrates in existence. They have diversified in very interesting ways to make different ecosystems their natural habitats. Learn how mammals are the same, how they are different, and which are the most and least evolved. Plus, discover what characterizes types of mammals, including monotremes, marsupials, rodents, bats, ungulates, elephants, herbivores, carnivores, cetaceans, and primates.

Originally released by Cerebellum Corporation, 2013. Streaming video file encoded with permission for digital streaming by Infobase on July 10, 2018.

Mammals: One Big Family: Introduction (1:23); --Mammal Diversification (3:36); -- Large Mammals (3:07); -- Intelligent Mammals (3:09); -- Mammals: One Big Family: Summary (2:25); -- Credits: Mammals: Part 2 (0:48); .