Silicon carbide, often used for grinding and machining applications, is pretty tough stuff! This application required that a permanent engraved mark be produced, without causing local mechanical weakening of the part. The laser ablates the material, leaving a clean engraved mark to the required depth.
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Swiss geoengineering start-up targets methane removal
No mention whatsoever about the effect of increased methane levels/iron chloride in the ocean on the pH and chemical properties of the ocean - are we...