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Scalpel - Wikipedia ... Scalpel
The technology to make scalpel blades out of smoky obsidian, a volcanic glass that allows for the sharpest blade production, was first developed by Don Crabtree in the late 1970s. The blades, which have edges only a few molecules thick, are 100 to 500 times sharper than the traditional surgical steel scalpels. [7]
Obsidian - Wikipedia ... Obsidian
Macuahuitl - Wikipedia ... Macuahuitl
Sometimes uncured tobacco powders were consumed during these procedures. Experts also suggested the obsidian blades found in the vessels could have been used for cutting umbilical cords.
Diamond knives are used in eye surgery, specifically in refractive surgery.. In particular they are the main tool, together with the microscope, for the radial keratotomy invented by Svyatoslav Fyodorov to correct myopia and for the Mini Asymmetric Radial Keratotomy (M.A.R.K.), invented by Marco Abbondanza to correct astigmatism and cure the first and second stages of keratoconus.
Obsidian use in Mesoamerica
Don E. Crabtree (June 8, 1912 – November 16, 1980) was an American flintknapper and pioneering experimental archaeologist . Known as the "dean of American flintknappers" he was mostly self-educated, however he was awarded an honorary doctorate degree by the University of Idaho. His 1972 publication An Introduction to Flintworking still serves ...
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