Roman concrete has outlasted modern structures by centuries, yet today’s engineers still can’t fully replicate its self-healing, ultra-durable formula. Is it just about the right volcanic ash, or is there a lost art in ancient craftsmanship we’re missing? Should we be investing more in decoding these old recipes for a greener, longer-lasting future—or is the past best left as a mystery? #Tech #RomanConcrete #AncientTech