From Ohio History Central

Megafauna is a termed applied to large mammals that dominated faunas of the Pleistocene Ice Age. In Ohio, the megafauna included mastodon, mammoth, ground sloth, peccary, giant beaver, horse, bison, muskox, stagmoose, short-faced bear, and probably dire wolf and saber-toothed cat. Most of the large animals became extinct at the end of the Pleistocene, about 10,000 years ago.

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