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user-inactivated  ·  2484 days ago  ·  link  ·    ·  parent  ·  post: Secret of how Roman concrete survived tidal battering for 2,000 years revealed

i went to the everglades one time, and there was a little plaque explaining how local native american tribes did this too, independently of the romans. i think we were already aware of the how but not the exact mechanism.