Early evidence of San material culture represented by organic artifacts from Border Cave, South Africa

TLDR

Recent discoveries show that sophisticated pigment use, beads, engravings, and stone and bone tools existed in southern Africa 75,000 years ago, but many artifacts vanished by 60,000 years ago, challenging the view that modern hunter‑gatherer behavior emerged only 20,000 years ago. Reanalysis of Border Cave artifacts reveals that Early Later Stone Age occupants used notched bones, wooden digging sticks, bone awls, and arrowhead‑like bone points decorated with red ochre, hafted tools with a beeswax‑Euphorbia resin mixture, wore marine shell and ostrich eggshell beads, and employed a wooden poison applicator containing ricinoleic acid, and Bayesian dating places the emergence of modern hunter‑gatherer behavior at about 44,000 years ago.

Abstract

Recent archaeological discoveries have revealed that pigment use, beads, engravings, and sophisticated stone and bone tools were already present in southern Africa 75,000 y ago. Many of these artifacts disappeared by 60,000 y ago, suggesting that modern behavior appeared in the past and was subsequently lost before becoming firmly established. Most archaeologists think that San hunter–gatherer cultural adaptation emerged 20,000 y ago. However, reanalysis of organic artifacts from Border Cave, South Africa, shows that the Early Later Stone Age inhabitants of this cave used notched bones for notational purposes, wooden digging sticks, bone awls, and bone points similar to those used by San as arrowheads. A point is decorated with a spiral groove filled with red ochre, which closely parallels similar marks that San make to identify their arrowheads when hunting. A mixture of beeswax, Euphorbia resin, and possibly egg, wrapped in vegetal fibers, dated to ∼40,000 BP, may have been used for hafting. Ornaments include marine shell beads and ostrich eggshell beads, directly dated to ∼42,000 BP. A digging stick, dated to ∼39,000 BP, is made of Flueggea virosa . A wooden poison applicator, dated to ∼24,000 BP, retains residues with ricinoleic acid, derived from poisonous castor beans. Reappraisal of radiocarbon age estimates through Bayesian modeling, and the identification of key elements of San material culture at Border Cave, places the emergence of modern hunter–gatherer adaptation, as we know it, to ∼44,000 y ago.