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.By the fifteen century, when the European nations were 'discovering' America, the country was inhabited by minimum of million natives. there was considerable diversity and there were several hundred different languages a mong the wide- raging tribes.
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