How did the first people get to North and South America?

Explanation:

Most scientists think the first people walked across a land bridge that went from Siberia to Alaska. That land is now underwater. The people walked north of the Brooks Range in Alaska and East of the Canadian Rockies. While Alaska south of the Brooks Range was covered with glaciers and Canada west of the Rockies was also covered with glaciers, that area was grassland and had no glaciers. The people came south into the United States, fanned out and some went to South America.

Some think that Asian fishermen simply kept going farther and farther out to sea and set up bases on the West Coast of America. Those bases became colonies.

Some think that European fishermen may have set up bases in America. (Similarities exist between the Basque language and some American Indian Languages. However, both may have originated from a nearby place in Asia.)

The last people to come were the Eskimos. They originated in Siberia and settled the Arctic ocean region of Asia and North America traveling in their boats and dog sleds. (Since they were the last non-western people to come to America, scientists tend to assume that earlier people used a similar pattern as did the eskimos. Such may not be correct.

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answer: alexander the great

explanation:

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom