Does Obsidian Really Form the Sharpest Edge?

The video explores the sharpness of Flint and Obsidian compared to modern tools. A custom setup is built to test hair splitting with various edges, including a razor blade, chisel, Flint, and Obsidian. The sharpness is quantified using a homemade Bess certified Sharpness Tester and Atomic Force Microscopy. Results show that while Obsidian is sharper, its fragility limits practical use. The video concludes with a discussion on the need for application-dependent sharpness standards.

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