https://www.thedailybeast.com/animal-mysteries
http://animalmozo.com/2016/07/03/19-of-the-biggest-unsolved-animal-mysteries/
http://allthatsinteresting.com/natural-phenomena-science-cant-explain
https://en.wikipedia.org/wiki/Palau
https://en.wikipedia.org/wiki/Jellyfish_Lake
http://www.dailymail.co.uk/news/article-1209638/Scientists-baffled-suicidal-cows-throw-cliff-Switzerland.html
http://www.epicadamwildlife.com/2014/05/31/the-legend-of-the-chinese-vampire-monkey/
http://beforeitsnews.com/strange/2014/05/the-chinese-vampire-monkey-2456436.html
https://en.wikipedia.org/wiki/Panama_Creature
https://en.wikipedia.org/wiki/Canvey_Island_Monster
http://nationalpost.com/news/fish-arkansas
https://www.nbcsandiego.com/news/weird/Expert-Explains-Squid-Strand-.html
https://nypost.com/2010/03/31/swan-down-john-boy-is-dead-but-was-it-poison-or-murder-2/
https://news.nationalgeographic.com/news/2011/01/110106-birds-falling-from-sky-bird-deaths-arkansas-science/
https://www.smithsonianmag.com/smart-news/actually-scientists-know-little-about-migration-monarch-butterflies-180956230/