" This volume resents the results of the most comprehensive scientific study of one of the most complete ancient human skeletons ever found in North America" (from the introduction).

"Kennewick Man is the name generally given to the skeletal remains of a prehistoric Paleoamerican man found on a bank of the Columbia River in Kennewick, Washington, United States, on July 28, 1996.^[1] It is one of the most complete ancient skeletons ever found. Radiocarbon tests on bone have shown it to date from 8.9k to 9k calibrated years before present.^[2][3] In the early 2000s, genetic analysis did not have sufficient techniques to analyze such ancient DNA. By 2013, however, techniques had improved and the ancient DNA (aDNA) was analyzed. In June 2015 the team announced their conclusions, that Kennewick Man had most in common with Native Americans among living peoples, including those in the Columbia River region where he was found....

"The discovery of Kennewick Man, along with other ancient skeletons, has furthered scientific debate over the exact origin and history of early Native American people.^[15] One hypothesis holds that a single source of migration occurred, consisting of hunters and gatherers following large herds of game who wandered across the Bering land bridge. An alternative hypothesis is that more than one source population was involved in migration immediately following the Last Glacial Maximum (LGM), which occurred ~22k to ~18k years BP, and that the land migration through Beringia was either preceded by or roughly synchronous with a waterborne migration from coastal Asia.^[34]" (Wikipedia article Kennewick Man, accessed 03-2018).