Very Old Engraving
Scientists identified a unique engraving that could be the oldest three-dimensional (3D) map in the world https://arkeonews.net/scientists-identified-a-unique-engraving-that-could-be-the-oldest-three-dimensional-3d-map-in-the-world/
Engraving copper
AI Overview
For hand engraving, it is generally better to work with annealed copper as it is significantly softer and easier to cut into, allowing for more precise and delicate details compared to workhardened copper, which is harder and more resistant to engraving tools...