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What is the sharpest object in the world? You might think it's a finely forged katana, but that's not even close. The real answer was created by nature itself hundreds of thousands of years ago. At home, a typical kitchen knife has an edge already incredibly thin. In hospitals, surgical tools go even further with blades much finer than what we use daily. Some artisans even shape blades from stone, but they still can't match what comes next. The sharpest material on Earth is obsidian, formed when lava cools so quickly it becomes glass. When carefully shaped, it creates an edge so fine it's nearly microscopic. In fact, its cutting edge can be far sharper than medical scalpels, capable of making extremely clean cuts. Even with today's advanced technology, reproducing that level of sharpness on a large scale is still incredibly difficult, proving just how powerful natural materials can