In a captivating exhibition, Extreme Mammals: The Biggest, Smallest, and Most Amazing Mammals of All Time, the American Museum of Natural History explores the surprising and often extraordinary world of extinct and living mammals. Featuring spectacular fossils and other specimens from the Museum’s collections, vivid reconstructions, and live animals, the exhibition examines the ancestry and evolution of numerous species, ranging from huge to tiny, from speedy to sloth-like, and displays animals with oversized claws, fangs, snouts, and horns. We continue to make discoveries about mammals today, even about what might be the most extreme mammals of all – ourselves.

Included in the exhibition is a cast of the newly revealed "missing link" Ida, the Darwinius masillae fossil that made a big splash in May 2009.

Extreme Mammals is organized by the American Museum of Natural History, in collaboration with the California Academy of Sciences, San Francisco; Cleveland Museum of Natural History; and the Canadian Museum of Nature, Ottawa, Canada.