extreme longevity construction.md

🛡️ architectural rules for a truly eternal wall (target: 10,000–100,000+ years) blocks block shape: hexagonal prism block size: flat-to-flat diameter: 30–40 cm block thickness: 20–25 cm block height per row: 15–25 cm block weight: 20–35 kg (manageable manually) material: pure basalt or comparable…