US CITIZENSHIP TEST PREPARATION

Detailed explanation-1: -In the 1970s, college students in archaeology such as myself learned that the first human beings to arrive in North America had come over a land bridge from Asia and Siberia approximately 13, 000 to 13, 500 years ago. These people, the first North Americans, were known collectively as Clovis people.

Detailed explanation-2: -Before Columbus We know now that Columbus was among the last explorers to reach the Americas, not the first. Five hundred years before Columbus, a daring band of Vikings led by Leif Eriksson set foot in North America and established a settlement.

Detailed explanation-3: -The settlement of the Americas began 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 (26, 000 to 19, 000 years ago).

Detailed explanation-4: -People travelled by boat to North America some 30, 000 years ago, at a time when giant animals still roamed the continent and long before it was thought the earliest arrivals had made the crossing from Asia, archaeological research reveals today.