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20:03the latest paper Ronny's is actually one of the um authors on this paper. >> Okay. >> It details nearly 200 previously undocumented earthworks in a very small patch of a corner of the rainforest. >> I just want to make a quick note. I think it's 400, not 200. It's It's double. It's double. It's >> Which is crazy. Yeah. >> Crazy. >> And then what's crazy is if you extrapolate the results, right? Um then that means that there's more than 20,000 additional earthworks cuz you can like do the math, right? You can be like, I sampled this region and then I found this many. I sampled the whole thing and this region was not any special compared
20:44to everything else, so I can make like a blanket kind of guess. 20,000 earthworks in that area. And just a few years ago, we used to think that there were 10,000 earthworks in the entire Amazon rainforest. And now we're talking about in this tiny area that we're going to get into.