Volcanic glass made tools sharper than steel
Ancient civilizations crafted tools from volcanic glass, obsidian, achieving edges sharper than early steel, a testament to nature's precision and human ingenuity still valued today.
Obsidian, a natural volcanic glass, forms when lava cools rapidly, creating a material so sharp it was used by ancient toolmakers for edges finer than steel. Its unique amorphous structure allows it to be flaked into razor-thin blades, often thinner than early metal tools. Prehistoric societies, like the Maya and Aztecs, crafted obsidian into arrowheads and knives as far back as 700,000 years ago. This natural material offered superior cutting efficiency for hunting and even early surgery, long before steel's invention. Remarkably, modern surgeons still use obsidian scalpels for delicate procedures like eye surgery, valuing their cleaner cuts and reduced tissue trauma.