At prehistoric sites in the "Four Corners" states (Colorado, Utah, Arizona, New Mexico) of the American Southwest, archaeologists have searched for years, looking for clues to the history of the Pueblo people. Learn what we know about these cliff dwellers. Study the thousands of rock carvings?petroglyphs?they left behind. Discover how modern scientists use ancient artifacts to learn about the lives of these early Americans.

Anita Croy has written many books for children—mainly about geography and history—including National Geographic Investigates Ancient Pueblo: Archaeology Unlocks the Secrets of America's Past, Inca Gold, and several National Geographic Countries of the World titles. She holds a doctorate in Latin American studies from the University of London.