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How Deep Does an Engraving Need to Be?
What does it take to make a mark that outlasts everything else? We dig into the physics of engraving — why a carved groove beats any sticker or paint — and what military and aerospace standards reveal about depth, materials, and survival. From spacecraft part numbers to 75,000-year-old cave engravings, we explore the oldest technology for permanence and what it teaches us about marking our own stuff. Episode 5049 — myweirdprompts.com/n/5049 (permanent short link: myweirdprompts.com/974061)
The skinny
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