Discovered during construction of the I-75 corridor northeast of Tampa, the site of Harney Flats was a turning point in the archaeology of the southeastern United States. Beneath evidence of human settlement from the Middle Archaic period, researchers unearthed Paleoindian stone tools--representing a rare example of a stratified site in the Southeast with a Paleoindian occupation. The expansive excavations at Harney Flats demonstrated that significant...