Key Takeaways
- The use of poison arrows by humans dates back to around 60,000 years ago, much earlier than previously believed.
- Researchers have discovered traces of natural poison on arrow tips collected from the Umhlatuzana Rock Shelter in South Africa, providing direct evidence of poison applied to Pleistocene hunting weapons.
- The plant compound used to poison the arrows, buphanidrine, comes from the Amaryllidaceae family of flowering plants, specifically from the Boophone disticha plant, known locally as "gifbol" or poison bulb.
- The use of poisoned arrows requires advanced planning, abstraction, and causal reasoning, demonstrating a high level of cognitive ability in early humans.
Introduction to Human Ingenuity
In understanding the evolution of humans, archaeologists look back to when our exceptional abilities began. Today, the human capacity to make tools to meet our needs is unprecedented in the animal kingdom. But where did our ingenuity start setting us apart? Inventing spears to enhance hunting prowess distinguished us from other primates—and equipping them with poison arrows was next level. The development of poisoned arrows marked a significant milestone in human technological advancement, requiring a deep understanding of plant and animal ecology, as well as the ability to plan and execute complex hunting strategies.
The Discovery of Poisoned Arrows
A study published in Science Advances reports that the use of poisoned arrows dates back to around 60,000 years ago, much earlier than previously believed. The first definitive evidence of poisoned arrowheads came from the mid-Holocene, in an Egyptian tomb dated to about 4,400 years ago and in a South African cave dating to about 6,700 years ago. In both cases, the arrows had been tipped with toxic plant compounds, considered a hallmark of advanced hunter-gatherer technology. However, the discovery of poisoned arrow tips in the Umhlatuzana Rock Shelter in KwaZulu-Natal, South Africa, has pushed back the timeline of human use of poisoned arrows by orders of magnitude.
The Poison Used in Arrows
The plant compound used to poison the arrows, buphanidrine, comes from the Amaryllidaceae family of flowering plants, specifically from the Boophone disticha plant, known locally as "gifbol" or poison bulb. The milky liquid from the plant can be used almost straight out of the plant by drying it to a gum-like consistency or heating it over a fire. The study authors conclude that these Late Pleistocene hunter-gatherers were making their poison from the gifbol root bulb extract, demonstrating a knowledge of plant and prey ecology coupled with lethal technical abilities. The use of poisoned arrows requires connecting several ideas—that arrows can be flung to kill animals, that certain plant compounds are poisonous to humans and maybe to animals, and that animals will die gradually from them.
The Cognitive Abilities of Early Humans
The use of poisoned arrows requires advanced planning, abstraction, and causal reasoning, demonstrating a high level of cognitive ability in early humans. Because poison is not a physical force, but functions chemically, the hunters must also have relied on advanced planning, abstraction, and causal reasoning. The ability to use poisoned arrows suggests that early humans had a deep understanding of the natural world, including the properties of plants and animals, and were able to apply this knowledge to develop complex technologies. This level of cognitive ability is a hallmark of modern human cognition and suggests that early humans were capable of complex thought and problem-solving.
Conclusion
The discovery of poisoned arrow tips in the Umhlatuzana Rock Shelter in South Africa provides new insights into the technological and cognitive abilities of early humans. The use of poisoned arrows dates back to around 60,000 years ago, marking a significant milestone in human technological advancement. The ability to use poisoned arrows requires a deep understanding of plant and animal ecology, as well as the ability to plan and execute complex hunting strategies. This level of cognitive ability is a hallmark of modern human cognition and suggests that early humans were capable of complex thought and problem-solving. The study of poisoned arrows provides a unique window into the lives of early humans, highlighting their ingenuity, creativity, and ability to adapt to their environment.