http://www.theoccultmuseum.com/9-creepiest-supernatural-unsolved-mysteries-that-have-never-been-explained/
http://all-that-is-interesting.com/the-five-greatest-mysteries-of-human-history
https://www.livescience.com/43519-taos-hum.html
https://en.wikipedia.org/wiki/Lal_Bahadur_Shastri
https://en.wikipedia.org/wiki/Assassination_of_John_F._Kennedy
https://en.wikipedia.org/wiki/Lae_Airfield
https://en.wikipedia.org/wiki/Amelia_Earhart
http://www.anishinabe-history.com/history/battle-of-tierra-blanca.shtml
https://en.wikipedia.org/wiki/Ambrose_Bierce
https://en.wikipedia.org/wiki/Black_Dahlia
http://www.theoccultmuseum.com/mysterious-disappearance-little-pauline-picard/
https://www.historicmysteries.com/pauline-picard-disappearance-story/
http://www.blumhouse.com/2017/03/14/san-fransiscos-unsolved-santeria-murder-of-1981/
http://ngm.nationalgeographic.com/2007/09/bog-bodies/bog-bodies-text