Information Links:
15 –
http://www.people.ku.edu/~jyounger/PHDisc/
https://www.teicrete.gr/daidalika/
14 –
https://www.cia.gov/about-cia/headquarters-tour/kryptos
http://jimsanborn.net/main.html#kryptos
13 –
https://en.wikisource.org/wiki/Zodiac_Killer_letters
http://scienceblogs.de/klausis-krypto-kolumne/2017/11/13/is-the-second-zodiac-killer-cryptogram-broken/
12 –
https://www.inyourpocket.com/kaliningrad/The-Seven-Bridges-of-Konigsberg_73910f
https://www.maa.org/press/periodicals/convergence/leonard-eulers-solution-to-the-konigsberg-bridge-problem
11 –
https://blogs.ams.org/mathgradblog/2014/06/01/eternity-ii-puzzle-unsolved/
https://en.wikipedia.org/wiki/Talk%3AEternity_II_puzzle
10 –
http://www.theweek.co.uk/mh370/57641/mh370-three-companies-offer-to-start-new-search-for-missing-plane
https://www.phuketgazette.net/news/final-search-ocean-infinity-looks-mh370
9 –
https://www.seti.org/seti-institute/project/details/fermi-paradox
https://cosmosmagazine.com/space/what-is-the-fermi-paradox
8 –
http://english.log-it-ex.com/2.html
https://theconversation.com/good-at-sudoku-heres-some-youll-never-complete-5234
7 –
http://www.bbc.co.uk/stoke/content/articles/2005/05/17/shugborough_code_feature.shtml
https://www.birminghampost.co.uk/news/regional-affairs/200-year-old-mystery-shugborough-code-solved-8319385
6 –
https://www.wired.com/story/why-an-old-theory-of-everything-is-gaining-new-life/
https://www.forbes.com/sites/quora/2018/01/10/what-does-the-theory-of-everything-really-mean-in-physics/#1edaa3004bed
5 –
http://www.appunwrapper.com/2015/01/07/do-not-believe-his-lies-the-unforgiving-riddle-walkthrough-guide/
https://kotaku.com/the-disturbing-puzzle-game-that-nobody-can-solve-1691388004
4 –
http://journals.openedition.org/jso/6658?lang=en
https://muse.jhu.edu/article/25394/summary
3 –
https://www.theguardian.com/theguardian/1999/sep/02/features11.g2
http://ciphermysteries.com/other-ciphers/beale-papers
2 –
http://www.telegraph.co.uk/news/2017/06/21/rocky-mountains-treasure-hunt-criticised-nonsense-another-man/
http://fennclues.com/fenn-treasure-where-to-start.html
1 –
https://www.smithsonianmag.com/history/the-body-on-somerton-beach-50795611/
http://www.adelaidenow.com.au/news/south-australia/has-part-of-the-mysterious-somerton-man-code-been-cracked/news-story/3951eef52092ee56916aeefbc1b7007b?nk=9871b44befec7f078cd8826a89815772-1517409703

Image Links:
Intro:
https://www.shutterstock.com/image-photo/student-girl-writing-formulas-on-transparent-306575858?src=TiqBXf2AY5oYMzaeV9bk9Q-4-24
https://www.shutterstock.com/image-illustration/iq-conceptual-meter-indicate-maximum-isolated-143515567?src=Eg5fSHe6CIzBA_CNZwupxg-1-61
https://www.shutterstock.com/image-photo/hilversum-netherlands-january-08-2014-twitter-173612945?src=ANNP4Hsb3j3fOeaTsD0nUQ-1-47
https://www.shutterstock.com/image-photo/escape-room-game-physical-where-players-607724234?src=gE9IoIdjk7LiJ-QzxKVdgQ-1-32
https://www.shutterstock.com/image-photo/secret-code-dancing-men-196954652?src=jsYe0jlatwN5CmfU64qYeA-2-10

15:
https://www.shutterstock.com/image-photo/heraklion-cretegreece-10132015-close-look-phaistos-1062705971?src=333SvppaFGcB0EyK2KHgVg-1-12
https://pixabay.com/en/egypt-temple-hieroglyphs-pharaoh-1197835/
https://upload.wikimedia.org/wikipedia/commons/e/ed/Phaistos_disk_A.jpg
https://upload.wikimedia.org/wikipedia/commons/2/2f/Phaistos_01.jpg
https://i0.wp.com/upload.wikimedia.org/wikipedia/commons/thumb/3/3d/PhaistosDiskLarge.jpg/800px-PhaistosDiskLarge.jpg
https://www.shutterstock.com/image-photo/ancient-disc-minoan-culture-hands-2757256?src=_LMf88ABELaSi9z2_hWhOg-1-7

14:
http://youthcarnival.org/bn/wp-content/uploads/2017/12/kryptos-nice-pic.jpg
https://wearethemighty-img.rbl.ms/simage/https%3A%2F%2Fassets.rbl.ms%2F17211383%2F980x.jpg/2000%2C2000/qG7mt%2Bxa2qH15QnM/img.jpg
https://www.videoblocks.com/video/letters-numbers-and-screen-pixilation-video-loop-bg_f3_llinahoa7f
https://media.wired.com/photos/593234185c4fbd732b551306/master/pass/kryptos-ft1.jpg
https://www.shutterstock.com/image-photo/genome-sequencing-deciphering-dna-code-write-1022601973?src=c1a0EfNvl_ZS2A7yzL7Opg-1-37

13:
https://scontent-sea1-1.cdninstagram.com/vp/9185730e2d7e98edb8548b6a52729649/5B234F99/t51.2885-15/e35/26868064_347747935702264_5562019825556914176_n.jpg?ig_cache_key=MTcwMTIxNzc2NzE5MTAzMzc5MQ%3D%3D.2
https://www.shutterstock.com/image-photo/man-shot-streets-bullet-casing-laying-119180896?src=KMFSeWmMkSCBWw7ZXIvdPw-1-9
https://pixabay.com/en/stack-letters-letter-handwriting-447579/
https://www.shutterstock.com/image-photo/horror-photo-bloody-killer-big-kitchen-1051839788?src=Y4cEAACxUTzpMpCYyQWXNg-3-37
https://upload.wikimedia.org/wikipedia/commons/8/80/Zodiac-Colour-SFC.jpg
https://www.shutterstock.com/image-vector/concept-question-mark-man-head-symbol-432099532?src=cY-7LjppC_n3RwJgTkHYKw-1-86

12:
https://regnum.ru/uploads/pictures/news/2018/01/18/regnum_picture_1516270483112521_social.jpg
https://pixabay.com/en/woman-man-persons-people-couple-3244245/
https://pixabay.com/en/architecture-bridge-building-travel-3121009/
https://4.bp.blogspot.com/-io8m4HPRWzI/V_5Qyl8B-uI/AAAAAAAAEWI/VDpqbploddcFk9IqJWv9QRJZag1ed95JACLcB/s1600/euler.jpg
https://www.shutterstock.com/image-illustration/cubes-question-marks-design-information-related-487316569?src=szWvNKmD6fzP34YpEC18Lw-1-5
https://media.giphy.com/media/qNQFUVIKAt9Ek/giphy.mp4
``https://pixabay.com/en/mathematics-formula-physics-school-1453830/

11:
https://muropaketti.com/dome/wp-content/uploads/s/f/editor/images/eternity_2_uut0707_2.jpg
https://cdn.4archive.org/img/0fch1cP.jpg
https://pixabay.com/en/puzzle-piece-tile-jig-jigsaw-game-3306859/
https://upload.wikimedia.org/wikipedia/commons/4/4c/Eternity_II_1.jpg
https://pixabay.com/en/usd-bills-dollars-money-cash-2874026/
https://pixabay.com/en/money-bank-notes-bill-bills-1760/
https://blogs.ams.org/mathgradblog/files/2014/06/DSC_0156.jpg
https://www.shutterstock.com/image-photo/time-running-out-concept-shows-clock-668357173?src=6l_6dybTJ3EH0pDofDvOmQ-1-14
https://www.shutterstock.com/image-photo/businessman-rich-man-hugging-bundles-stack-629558261?src=q2OrzmSSXtc9BY5MrPmk8g-1-3

10:
https://www.shutterstock.com/image-photo/plane-on-radar-46528372?irgwc=1&utm_medium=Affiliate&utm_campaign=Hans%20Braxmeier%20und%20Simon%20Steinberger%20GbR&utm_source=44814&utm_term=
https://pixabay.com/en/airplane-in-the-evening-sky-fly-2909311/
https://pixabay.com/en/airplane-aircraft-3262726/
https://upload.wikimedia.org/wikipedia/commons/6/6d/Pray_for_my_compatriots_on_Malaysia_Airlines_flight_MH370._%2813010243353%29.jpghttps://upload.wikimedia.org/wikipedia/commons/6/6d/Pray_for_my_compatriots_on_Malaysia_Airlines_flight_MH370._%2813010243353%29.jpg
https://pixabay.com/en/question-mark-knowledge-question-3255118/

9:
https://photojournal.jpl.nasa.gov/jpeg/PIA17254.jpg
https://www.videoblocks.com/video/spinning-into-oblivion-0og7lpw
https://www.shutterstock.com/image-photo/black-satellite-under-storm-clouds-84131515?irgwc=1&utm_medium=Affiliate&utm_campaign=Hans%20Braxmeier%20und%20Simon%20Steinberger%20GbR&utm_source=44814&utm_term=
https://www.videoblocks.com/video/moving-through-stars-in-space--uocsza
https://www.shutterstock.com/image-illustration/alien-planet-building-digital-painting-597717392?src=daYezB7MzMTbTWhBu9VHNQ-1-38
https://www.videoblocks.com/video/space-1081-hm1tzfueinaifjjd
https://pixabay.com/en/soap-bubble-ball-question-mark-63982/
https://www.shutterstock.com/image-illustration/alien-planet-two-moons-103232147?src=aIkaUyUj8qBopFp63L-pKA-1-20

8:
https://c1.staticflickr.com/3/2265/2156513671_ecc1608819_b.jpg
https://www.shutterstock.com/image-photo/top-view-male-hands-solving-sudoku-432200938?irgwc=1&utm_medium=Affiliate&utm_campaign=Hans%20Braxmeier%20und%20Simon%20Steinberger%20GbR&utm_source=44814&utm_term=
https://pixabay.com/en/sudoku-puzzles-mysterious-folder-552944/
https://www.shutterstock.com/image-vector/vector-sudoku-answer-puzzle-game-numbers-434877550?src=kf1KwrtkTtWWyQ64E4uNiA-1-32
https://pixabay.com/en/monitor-binary-binary-system-1307227/
https://pixabay.com/en/system-error-codes-database-system-2830869/
https://pixabay.com/en/toilet-paper-sudoku-pastime-funny-3047628/

7:
http://gailallen.com/images/theo/ShugboroughHall.jpg
http://s0.geograph.org.uk/geophotos/03/08/15/3081598_f8c55af8.jpg
http://www.funnylla.com/articles-images/233/gallery/_233_2887116715.jpg
https://silentthrill.files.wordpress.com/2013/12/shugborough_inscription_d_ouosvavv_m.jpg
https://www.shutterstock.com/image-illustration/grail-cave-268713941?src=jMAfSE3OXyw4-XBxmsAZTA-1-0
https://www.shutterstock.com/image-photo/close-shot-persons-torso-dressed-historically-510318868?src=SoFFQD7mjntW6iuiMYMHng-1-2

6:
https://upload.wikimedia.org/wikipedia/commons/c/ce/Varsha_2.jpg
https://www.shutterstock.com/image-photo/starfield-elements-this-image-furnished-by-295846730?src=rZu468CvqqKSNKrSFwoqOQ-1-16
https://www.shutterstock.com/image-illustration/close-pink-atomic-particle-background-science-518202946?src=MJ9MvYar4p_9U8jVrFqmog-1-7
https://odysseyonline-img.rbl.ms/simage/https%3A%2F%2Faz616578.vo.msecnd.net%2Ffiles%2F2017%2F02%2F06%2F6362199729965185771482887242_172129main_gpb-earth-300dpi%2520copy.jpg/2000%2C2000/L0DzO63ryp8tT%2B8h/img.jpg
https://pixabay.com/en/banner-header-mathematics-formula-982162/
https://www.shutterstock.com/image-vector/blackboard-inscribed-scientific-formulas-calculations-physics-582084685?src=WfNu7P7Q79G-kQyU3U7JFQ-1-0

5:
https://pixabay.com/en/truth-lies-philosophy-wisdom-2069843/
https://pixabay.com/en/download-button-symbol-design-1536638/
https://www.shutterstock.com/image-vector/vector-illustration-puzzle-icon-flat-app-242250556?src=8daer9i39ENmQxEMi-Ywrw-1-6
https://www.shutterstock.com/image-photo/idle-gaming-concept-girl-playing-jigsaw-316519571?src=nTkNH70cKpI0BlzE9i5vDg-1-2
https://www.shutterstock.com/image-photo/male-game-developer-works-on-new-715104247?src=p4MWp0TVP5z-OxJddv31PQ-1-3
https://game-solver.com/wp-content/uploads/2015/07/Do-Not-Believe-His-Lies-Level-3.jpg
https://pixabay.com/en/matrix-binary-security-private-2883623/
https://pixabay.com/en/iphone-new-smartphone-phone-white-2735443/

4:
https://www.factinate.com/wp-content/uploads/2018/02/18-2.jpg
https://www.shutterstock.com/image-photo/ahu-tongariki-largest-on-easter-island-246740491?src=BYZAp5ACGDBw0olS_zXkwA-1-59
https://www.shutterstock.com/image-photo/people-samples-archeology-hands-232384813?src=lZAugGP2fXCja8VJodhc7Q-1-78
https://s4.scoopwhoop.com/vsh/mystery/11.jpg

3:
https://www.shutterstock.com/image-vector/vector-illustration-abstract-big-data-numeric-673438183?src=8b-CcrqjD__l46pYspWDiw-1-6
https://upload.wikimedia.org/wikipedia/commons/9/9d/Beale_Papers.gif
https://www.shutterstock.com/image-photo/open-treasure-chest-filled-gold-coins-606386186?src=qQc4B24vkQyDJnc2FJ1bTw-4-44
https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Beale_3.svg/1120px-Beale_3.svg.png
https://www.shutterstock.com/image-photo/chisinau-moldova-april-26-2016-workers-441155044?src=qdyuCY8U3ogTgNGgbmZIkw-1-25
http://www.phil-splitter.com/assets/images/autogen/a_Us_declaration_independence_1.gif
https://pixabay.com/en/key-gold-symbol-metal-entrance-3071329/

2:
https://www.gannett-cdn.com/-mm-/da57be9bf4e6969ad96b7060d609c21765e6154a/c=0-112-2200-1355&r=x1683&c=3200x1680/local/-/media/2017/06/20/FortCollins/FortCollins/636335721433482953-AP17171612426184.jpg
https://www.shutterstock.com/image-photo/old-wooden-chest-pile-various-golden-308491949?src=WDwxirEOuNWtGXdFcM_fwQ-6-29
https://www.shutterstock.com/image-illustration/dna-strand-cancer-cell-oncology-research-659631763?src=e_HPlwRBFcWSKWu6LT3HyA-1-26
https://i.pinimg.com/736x/05/01/a6/0501a6e64faec2542139c6b871f2af6e--pirate-treasure-chest-buried-treasure.jpg
https://www.shutterstock.com/image-photo/close-view-legs-dead-body-wrapped-574082326?src=2nujYx8zOB3N53ihFO12Qg-1-1
https://www.shutterstock.com/image-photo/police-officer-emergency-service-car-driving-296752184?src=XNPVGELFHv_JEgkEGE48TQ-1-1

1:
https://www.shutterstock.com/image-photo/dream-business-manager-2-51341149
https://www.shutterstock.com/image-photo/blue-jean-pocket-paper-402982114?src=Kme_sJWo3brsTeIkZOg7yA-1-11
https://www.shutterstock.com/image-photo/red-light-flasher-atop-police-car-446231665?src=FVGsI88YJSAeryTQcUHWuw-1-13
https://pixabay.com/en/texture-handwriting-s%C3%BCtterlin-1362879/
https://upload.wikimedia.org/wikipedia/commons/7/77/SomertonManCode.jpg