Very interesting. But concrete not cement. Cement is a powder that would have blown away in the next breeze. Cement plus aggregate plus water forms solid concrete.
Very interesting. But concrete not cement. Cement is a powder that would have blown away in the next breeze. Cement plus aggregate plus water forms solid concrete.
Great historical story, but where are they. We need to know where they are.
Super interesting, if I had happened across them, I would have been scratching my head wondering what they were! Thank you for sharing, you can never stop learning.