From Ohio History Central
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Prehistory in Ohio refers to that period of time (see [[Ohio's Prehistoric Timeline]]) when people were living here, but did not record the events in their lives in documents that have been preserved to the present day. It is "history without the words." The prehistoric period in Ohio began at least 15,000 years ago when humans entered the region near the end of the last Ice Age. The period ended around 350 years ago when French explorers in Canada began to record information about the lands along the south shore of Lake Erie.