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On a hillside in the badlands of Ethiopia, an ancestral home of the human family, an international team of scientists has uncovered the earliest known stone tools to be found mixed with fragments of fossilised animal bones... |
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| New Clue on which came First, Tools or Better Diets (October 2003) |
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The scientists think the material, almost 2.6 million years old, is the strongest evidence yet that the primal technology was used to butcher animal carcasses for meat and marrow. The discovery could go a long way toward resolving a debate in paleoanthropology: which came first, a significant advance in the brain that enabled human ancestors to make tools, or the tool-making ability that led to an enriched diet and then an evolutionary change in the brain? "I believe the use of stone tools came first and the larger brain came later with a more substantial meat diet," Dr. Sileshi Semaw, the leader of the discovery team, said last week by telephone... |
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