Complete Idiot’s Guide to American History
by Alan Axelrod
Who’s on First?
(50,000 B.C.-A.D. 1500S)
In This Chapter
Where the “first Americans” came from
The Mayas, Incas, and Aztecs
The Anasazi, Mound Builders, and Pueblos
Leif Eriksson, first European in America
Look at a map that shows the north Pacific Ocean. You’ll find the Bering Sea, an arm of the Pacific bounded on the east by Alaska, on the south by the Aleutian Islands, and on the west by Siberia and the Kamchatka Peninsula. Near the north end of the Bering Sea is the Bering Strait, which, lying between Alaska and Siberia, connects the Bering Sea with the Chukchi Sea of the Arctic Ocean. At its narrowest, the strait is only 55 miles across, the shortest distance between the continents of North America and Asia. Fifty-five miles in icy cold water is a long swim, but not much of an ocean voyage. Historians believe that once upon a time, there wasn’t even that 55 miles of water between the continents.
A Stroll Across the Bering Sea
Several times during what paleontologists call the Quaternary Period—that’s their name for the last two million years—a “land bridge” emerged in the Bering and Chukchi Seas as the sea level dropped due to the expansion of the ice cap surrounding the North Pole. The theory is that anywhere from 10,000 to 45,000 years ago, human beings used the Bering land bridge to enter the New World, migrating from what is now northeast Asia to northwestern North America. Beringia, as the land bridge is sometimes called, disappeared when the major continental ice sheets and other glaciers melted, causing the sea level to rise again.