“…O'Brien (1981O'Brien ( , 1984, Calvin (1983, 1990, 1993, 2o02) and, most recently, Samson (2006) have described handaxes as early hunting weapons, aerodynamically designed to be thrown like a discus, spinning in flight and most often turning in their descent so that they strike with the sharp edge or point. We have argued against this model and its evolutionary implications, as developed most fully by Calvin, basing our skepticism on both experimental and archaeological data (Whittaker and McCall 2001).…”