What is known about the first American?        How did native American life differ in the Southwest, the Northwest, the Great Plains, and east of the Mississippi River?       What kinds of civilizations did Native Americans build in Mexico, Central America, and South America?

        Imagine what America was like 50,000 years ago. It was a time called the Ice Age. The climate was much colder than it is today, and most of North America was covered with huge sheets of ice. Fifty thousand years ago, people had not yet come to America.