Cutting-edge archaeological work that included use of a drone and prescribed fire has unearthed previously unknown information about a one-of-a-kind Native American archaeological site in northeastern Montana dating back thousands of years. ... everything you can see archaeologically speaking on the northern plains is contained within 300 acres .. The project also has given archaeologists new information on how prairie fires interact with cultural resources that can be applied to other locations. ... The prehistoric collection of large-scale stone at the Henry Smith archaeological site spans 320 acres in Phillips County. Since the 1960s, it's been known that the site...