| Summary: | Taken together the Americas, North and South, cover an enormous geographical area which runs from one polar region to the other, comprising all kinds of climates and ecological environments, including rainforests, deserts, prairies and some of the highest mountains in the world. Human beings began settling here some 20,000 years ago. Scholars are convinced that the first Americans wandered across the land bridge which at the time connected Asia and North America — across today’s Bering Strait.
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