The Atlatl (derived from the Aztec word Nahuatl, which means spear thrower) was a simple device that helped hunters magnify the force with which they could propel a spear. This invention made its appearance at least 10,000 years ago (8,000 B.C.) and was in wide use during the Archaic Period (8,000 to 1,000 B.C.).
No one knows for sure when wolves and human beings officially began their mutually beneficial partnership, but some of the oldest known domesticated dogs in North America were found at the Koster Site in Greene County. The remains of four dogs were intentionally buried near human burials there about 8,500 years ago.