1.   It was there that Jackson first became acquainted with the ruins of prehistoric Indian cultures.

2.   Prehistoric cultures used daub for plaster, making it from local clay and smearing it onto pole-framework homes insulated with grass, Logan said.

3.   Scientists digging there have found evidence of both the prehistoric Hohokam culture and the historic Pima culture.

4.   The Sharlot Hall Building houses exhibits tracing prehistoric cultures and Native American culture in Arizona.

5.   Thousands of years before highways linked Kansas City and southern Illinois, a prehistoric Indian culture may have traveled regularly between the two sites, an archaeologist says.

6.   Scholars said the bone flutes provide further proof that prehistoric Chinese culture was not crude.