On the more traditional front, archaeologists have uncovered evidence of advanced culture and mining activities in Wisconsin dating back to at least 9000 BCE. At sites like Oconto and Osceola' copper artifacts, including spears, arrow points, knives, adzes, gouges, fishhooks, and harpoons have been found in association with textiles, drilled beads, and even bone flutes that can still be played. (The Giants Who Ruled America)