Select Language:
A recent study reveals that ancient human ancestors were more organized and skilled than previously believed. Nearly 800,000 years ago, they intentionally selected different types of stone for specific tools rather than randomly gathering whatever rocks were nearby.
These discoveries suggest that early humans had a detailed understanding of their environment, demonstrated advanced planning skills, and maintained technological traditions across many generations.
The research, published in Scientific Reports, centered on the archaeological site of Gesher Benot Ya’aqov (GBY) in present-day Israel. Dating back approximately 780,000 years, the site provides evidence of repeated visits by Acheulian hominins—a primitive human group recognized for crafting large stone tools. Past excavations at GBY uncovered a significant collection of artifacts, including stone tools, signs of controlled fire, plant use, fish handling, and animal processing. Among their preferred materials was basalt, a durable volcanic rock well-suited for producing sizable cutting implements like hand axes and cleavers.
While scientists understood that creating these tools involved a complex process—selecting large basalt slabs, shaping them into giant cores, then removing flakes to refine the desired tool—the new study aimed to identify where these hominins sourced their basalt.
Researchers examined the chemical makeup of basalt tools found at the site. Each basalt flow has a distinct chemical signature, akin to a geological fingerprint. By comparing these signatures with those of basalt samples from surrounding regions, the investigators could determine the original source of the stone.
Findings showed many tools were crafted from basalt coming from sources within about a kilometer of the site. Interestingly, some tools matched basalt flows now buried deep underground and no longer visible on the surface. This information helped reconstruct ancient landscapes that existed hundreds of thousands of years ago before geological processes like earthquakes, erosion, and sediment deposition dramatically changed the terrain. The region lies along the tectonically active Dead Sea Transform, an area where Earth’s shifting plates have continually reshaped the landscape over time.
The study also revealed that different tool types correlated with different basalt sources. Large cores often originated from nearby or now-buried local basalt, while some cleavers came from more distant sources. This pattern suggests that hominins deliberately selected stones based on their specific qualities, such as size, shape, internal structure, and suitability for particular manufacturing techniques.
Evidence indicates these stone selection practices persisted over tens of thousands of years and were likely passed down through generations. The consistent reuse of these methods highlights that early humans weren’t merely surviving—they were learning about and actively understanding their environment.
Nearly 800,000 years ago, they knew where to find the optimal stone, how to process it, and which types suited different tools. In essence, they possessed a surprisingly sophisticated knowledge of their material resources, emphasizing the importance of choosing the right rock for each task—a remarkable achievement for that era.
ChatGPT
Perplexity
Gemini AI
Grok AI
