As civilizations from Rome to the Maya harnessed empirical ingenuity to create materials with built-in healing, color-shifting, or structural resilience, they left behind recipes that modern science is only now decoding. From rust-proof iron pillars and self-repairing concrete to nanotech-level glass and ancient vulcanized rubber, these ten remarkable “smart” materials demonstrate how our ancestors engineered […] The post 10 Ancient “Smart” Materials Scientists Still Can’t Reproduce appeared first on Listverse.