American mastodon Directory References Images Discover Attack on Pearl Harbor Timeline Horsing Around: 7 of the Weirdest Racehorse Names in History Nikola Tesla's Weird Obsession with Pigeons The 6 Deadliest Earthquakes Since 1950 Vietnam War Timeline Periods of American Literature 9 of the World’s Deadliest Snakes Contents American mastodon extinct mammal Ask the Chatbot a Question Ask the Chatbot a Question Also known as: Mammut americanum Learn about this topic in these articles:mastodons In mastodon…the North American mastodon (Mammut americanum) support the hypothesis that the mastodon’s genetic diversity declined as conditions warmed, resulting in a retreat of the continental ice sheets and the animal’s geographic range.Read More