The rock of the Campi Flegrei Caldera, west of Naples, Italy, has an intricate network of mineral fibers—just like the famed Roman concrete. Christopher Intagliata reports.
— Read more on ScientificAmerican.com
The rock of the Campi Flegrei Caldera, west of Naples, Italy, has an intricate network of mineral fibers—just like the famed Roman concrete. Christopher Intagliata reports.
— Read more on ScientificAmerican.com