Archaeologists have discovered that people lived in America at least 12,000 to 15,000 years ago, and perhaps even 40,000 years ago.
These people probably came from Siberia, traveling across a bridge of frozen land that once existed between Russia and Alaska.
Over thousands of years, their descendants moved south and east, settling throughout the Americas and giving birth to the many different Native American peoples.
Spear points from 10,000 to 11,000 years ago have been discovered in present-day Colorado and New Mexico, and there are signs of equally old wood-post dwellings in the Shenandoah Valley in Virginia.
One of the first European maps of the Southwest was based on a drawing made in the dirt in 1542 by a Wichita woman known as Big Eyes.