Unveiling Ancient Secrets: How Early Humans Used Plant Poison for Hunting
A groundbreaking discovery has revealed that early humans were far more sophisticated hunters than previously thought. Researchers have uncovered 60,000-year-old traces of plant poison on stone arrowheads found in a South African rock shelter, suggesting a complex and strategic approach to hunting.
The study, led by Professor Sven Isaksson of Stockholm University, analyzed quartz tips from the Umhlatuzana Rock Shelter in KwaZulu-Natal, South Africa. The presence of the same poison on both prehistoric and historical arrowheads is significant, indicating a deliberate and consistent use of plant-based toxins.
The plant in question is the gifbol (Boophone disticha), native to South Africa and known for its highly toxic sap. The alkaloids buphanidrine and epibuphanisine, found in the plant, can affect the nerves and hearts of animals. This discovery challenges the notion that the poison was an accidental residue, suggesting a deliberate and calculated use.
The poison's mechanism is fascinating. It works by reaching the blood through a small wound, causing a slow breakdown in coordination that weakens the prey over time. This method requires patience and teamwork, and it likely rewarded those who planned ahead and shared roles.
The study also found similar chemical signals on arrow tips from a later period, kept in Swedish museum collections. This suggests that the poison could persist in the soil for extended periods, indicating a long-standing tradition of using plant-based toxins for hunting.
The research involved meticulous laboratory work to separate ancient molecules from natural grime. Gas chromatography-mass spectrometry was used to identify specific compounds, ensuring the accuracy of the findings. However, the study also emphasizes the importance of context, as even strong matches can be misleading.
The design and use of poisoned arrows align with patterns seen in later bow hunting. Microliths, small stone pieces set into shafts or bone, can leave impact scars when they strike hard tissue. The presence of residue along the backed edge of some pieces suggests the use of an adhesive to hold it in place.
The use of plant poison in hunting introduces a wait between the shot and the payoff, requiring memory and teaching to ensure the knowledge is passed down through generations. While it doesn't prove a single group invented the method, it highlights the continuity of hunting techniques.
The study's findings have sparked debates about early human planning and the universal practice of using plant poison. The research calls for more samples to be analyzed before any definitive conclusions can be drawn. The study is published in Science Advances.
This discovery not only sheds light on the hunting strategies of early humans but also highlights the importance of preserving and studying ancient artifacts to uncover the secrets of our past.
