Asked by Anonymous

What is the leading theory about how early humans arrived on the American continents?


• They walked from Africa to South America when those two continents were part of the same landmass.
• They walked from Asia to North America over a strip of land that has since been covered by the ocean.
• They sailed in large ships from Australia to North America.
• They canoed from Antarctica to South America when the climate there became too harsh.

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