Canadian scuba diver in Mexico accidentally discovers vast, prehistoric industrial complex | National Post
https://nationalpost.com/news/world/a-canadian-scuba-diver-in-mexico-accidentally-discovers-a-vast-prehistoric-industrial-complexDeep in since-flooded caves, researchers find evidence of America's first miners
https://www.nbcnews.com/science/science-news/deep-flooded-caves-researchers-find-evidence-america-s-first-miners-n1232871Humans were creating necklaces more than 120,000 years ago, a new study finds - CNN Style
https://www.cnn.com/style/article/ancient-humans-shell-necklaces-scn/index.htmlPaleoindian ochre mines in the submerged caves of the Yucatán Peninsula, Quintana Roo, Mexico | Science Advances
https://advances.sciencemag.org/content/6/27/eaba1219