Between 1945 and 1969, archaeologists hurriedly surveyed over 20,000 prehistorical sites before the Mississippi River Basin was flooded by dams.
Cahokia was the largest pre-columbian settlement north of Mexico. It collapsed centuries before Europeans arrived in the region. What happened?
Humans may have inhabited the Americas much longer than initially suspected. But questions like who these people were remain unanswered.
Kennewick Man is indeed most closely related to modern Native Americans. New results bolster the argument for repatriation and reburial.