 The increase in the consumption of meat around this time could be directly linked to increases in brain size that are reported in the archaeology record of this time.The invention of hafting by people more than hundreds of thousands of years ago has directly contributed to the health and lives of people in the past and also people in the future.Multiple lines of evidence indicate that ~500,000-year-old stone points from the archaeological site of Kathu Pan 1 (KP1), South Africa, functioned as spear tips.