American Mastodon Board Books and over the course of

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American Mastodon Board Books and over the course ofAmerican Mastodon Though similar in appearance to the woolly mammoth, the American mastodon is not closely related. The mastodons split from the other members of the order Proboscidea around 25 million years ago. The most well known of these beasts was the American mastodon, which was the last of the group to go extinct about 11,000 years ago. History: Though the genus name Mastodon is no longer used in this creatures scientific name, its still the