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Ancient Tools Unearthed: 90,000 Years of Innovation

1/30/2026

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Summary

Researchers Uncover Ancient Tools

Excavations at the Xigou site in central China have uncovered hafted stone tools dating from 160,000 to 72,000 years ago.
The findings show the earliest known use of handle implements in the region.
Researchers identified 22 hafted tools, indicating a sophisticated understanding of tool-making.
The persistence of these technologies over nearly 90,000 years shows adaptability to changing environments.

Summary

China Analyzes B-21

China Aerodynamics Research and Development Centre (CARDC) says PADJ-X identifies aerodynamic limitations in the U.S. Air Force B-21 Raider using public data.
The study, published in Acta Aeronautica et Astronautica Sinica, models a 15% lift-to-drag improvement through theoretical analysis.
As the B-21 advances through flight testing, the work notes that the findings do not account for classified design elements.

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Researchers Uncover Ancient Tools

Excavations at the Xigou site in central China have uncovered hafted stone tools dating from 160,000 to 72,000 years ago.
The findings show the earliest known use of handle implements in the region.
Researchers identified 22 hafted tools, indicating a sophisticated understanding of tool-making.
The persistence of these technologies over nearly 90,000 years shows adaptability to changing environments.

1 / 2