From a European perspective, the first explores were engaged in the settlement and discovery of the 'new world'. However, the history of the US is but a recent episode in comparison with the history of the North America continent and its people. Between 54 million and 2 million years ago, the continent evolved into a from we know today. At least 15000 to 20000 years, nomadic hunters began to migrate from Asia across the Bearing Strait.
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