Wilkins, J., Schoville, B.J., Brown, K.S., Chazan, M., 2012. Evidence for Early Hafted Hunting Technology. Science 338, 942-946.
This paper reports ~500ky old stone spear tips from Kathu Pan 1 in South Africa, which suggests that the common ancestor of Neanderthals and Anatomically Modern Humans was manufacturing hafted spears much earlier than previously thought. Comparison with experimental and archeological stone artifacts indicated that fracture types, wear, base modification and symmetry are consistent with functioning as hafted thrusting spears but not with cutting or scraping.