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They tried to turn obsidian into a knife and the material fought back
This experiment started with a simple but risky question: could obsidian be worked like glass and shaped into a knife. Instead of cooperating, the material kept cracking, slumping, changing color, and ...
Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage ...
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