Very interesting that the settling of Teotihuacan may have been stimulated by the catastrophic eruption of Popocatepetl. As our lives become increasingly dependent on machines, I think it is easy to forget that the raw power of natural forces often dictates our activities and stimulates our movements. (For instance, during and following the COVID-19 pandemic, many people changed the manner of their movements, from shopping largely online while staying at home and moving out of city centers entirely.) It raises many intriguing questions, such as how animal groups and migrations were affected by the Popocatepetl eruption, and how the water table was affected. Thank you, Dr. Carballo, for making your research available to the Aztlander!