Sharing this here because it looks applicable to solarpunk

  • webghost0101
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    1 year ago

    I think it was a few weeks ago that National Geographic was playing at my inlaws.

    If i recall correctly the roman concrete that was recreated by the show had to harden in a vat of water after which it was more durable then modern concrete. The blood was spoken about like a mysterious secret ingredient… but that could have been just tv flair. The show after was about aliens.