Why did the first americans cross into North America from Asia

Answer

The settlement of the Americas is widely accepted to have begun when Paleolithic hunter-gatherers entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum.

Explanation:

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new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

keeping a cash reserve because cash flow is the the movement of money through a company and if it just sits there, it wont the movement