Self-healing in seawater — why Roman structures get stronger

6:16It's and and we still can't figure out how they did it. >> Okay. >> But we're getting close. >> That that to me that that that that's how do we not know? >> Yeah. I mean, and we're we're going to find out why it's why it's so difficult. [laughter] Right. In 2017, there was a paper um in the American Minologist from the University of Utah and they actually showed that this when this concrete got in touch with marine ecosystems, so with salt water, it would actually strengthen itself. It was like a smart material where it was like repairing itself if there was a crack in the concrete. Unlike modern concrete where the thing just like, you know, you got to decommission it, you got to tear it down, build a new bridge. This stuff was

6:57actually self-reinforcing. >> Okay. So, that was in 2017 already. We've got like a smart material that's