Humans have advanced incredibly throughout the years, but there are still a few things we haven’t figured out. Take for example, these puzzles that although have been around for decades and centuries, have actually never been figured out by anyone!
#1. Voynich Manuscript: This is allegedly 600 years old and completely handwritten in an undecipherable language possibly a medical textbook.
#2. Vinca/Old European: A collection of symbols were found on artifacts from between 6000 to 4500 BC. It is not known if these symbols are a writing system.
#3. The Phaistos Disk: This circular clay tablet is about six inches across discovered in the early 1900s. This alphabet could possible help decipher Linear A.
#4. Shugborough Inscription: These letters were carved into stone in Shugborough Hall in Staffordshire England. No one knows why or what their meaning is.
#5. Rohonc Codex: Name after a city in western Hungary, it was written in an unknown language.
#6. Richard Feynman’s Challenge Ciphers: In 1987, a Caltech professor named Richard Feynman was given three samples of code by a colleague. Only one was ever solved.
#7. Proto Elamite: This script first appeared in 2900 BC in South-Western Iran. It has yet to be deciphered.
#8. Pigeon Cipher: There was an unsolved WWII message found attached to the remains of a pigeon which were found in a chimney.
#9. Navajo Code Talkers: During WWII the alliens used Navajo Indians in order to send encrypted messages. Because the language is so difficult normally, the code was never broken.
#10. Kryptos: In 1900 a sculpture with a 4 sections of encryptions was installed at the CIA headquarters. The 4th section has not been solved.
#11. Indus Script: The Indus Valley civilization existed in 2600 to 1800 BC and they left behind thousands of objects inscribed with pictograph scriptis.
#12. Enigma Encryption System: This popular encryption mechanism used by Germany in WWII resulted in some messages that couldn’t ever be deciphered.
#13. Dorabella Cipher: In 1897 composer Edward Elgar sent this encrypted message to a 23 year old friend Dorra Penny. It has not yet been solved.
#14. D’Agapeyeff Cipher: Alexander D’Agapeyeff wrote a book on cryptography in 1939 including this challegnge cypher. Not even he could solve it.
#15. Chinese Gold Bar Ciphers: In 1933, seven gold bars were issued to General Wang in Shanghai containing pictures writing cryptograms and Latin letters.
#16. Chaocipher: It’s not technically unsolved, but no one knows why it was in author J.F. Byrne’s autobiography.
#17. Blitz Ciphers: These were discovered during WWII in a bombed cellar in East London. They depict 50 calligraphic symbols – possibly 18th century Freemason ciphers.
#18. Bellaso Ciphers – Bellaso, a 16th century Italian cryptologist is responsible for many techniques used today and many of his “challenge” ciphers have yet to be solved.
#19. Beale Ciphers – In 1885 a small pamphlet was published in Virginia containing encrypted messages. They were supposed to lead to a treasure but were never solved.
#20. Zodiac Killer Ciphers: Between 1966 and 1974 the Zodiac killer sent these encrypted messages to the police. Many remain unsolved.
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