https://www.npr.org/sections/krulwich/2012/10/22/163397584/how-human-beings-almost-vanished-from-earth-in-70-000-b-c
https://www.sciencedaily.com/terms/toba_catastrophe_theory.htm
https://www.forbes.com/sites/davidbressan/2021/07/12/study-shows-how-humanity-survived-the-toba-supervolcano-eruption/?sh=58cb76c13c81
https://gizmodo.com/close-calls-three-times-when-the-human-race-barely-esc-1730998797
https://www.history.com/topics/middle-ages/black-death
https://blog.ucsusa.org/david-wright/nuclear-war-and-the-science-experiment-of-january-25-1995-603/
https://en.wikipedia.org/wiki/Black_Death