Today there are a few stories that remain unresolved. But still, puzzles, codes, and mysterious sounds still have a power to intrigue: why the messages are coded and what secrets they hide? Despite the researches of historians, scientists and cryptographers, some unexplainable riddles still confound us till the present day.

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• Voynich Manuscript

In 1912, Wilfrid M. Voynich, a Polish-American bookseller, has acquired an odd manuscript. It is a book that contains 240 pages of text written in an unknown language. The pages of a book are also full of strange drawings, diagrams, strange plants that do not match any of known species.
The original author remains unknown. However, the world’s most mysterious manuscript is believed to be made in 1404-1438.

• Beale Ciphers

The Beale Ciphers are three ciphertexts that explain the location of the greatest buried treasures in the history of USA: thousands of pounds of jewels, gold and silver. Originally, the treasure was obtained in 1818 by Thomas Jefferson Beale during the explorations in Colorado.
Only the second ciphertext has been already cracked. This text reveals the place where the treasure is. It is Bedford County, but the definite location is believed to be encoded in the other ciphers that stay unlocked. Treasure hunters are still digging the hillsides of the Bedford County, looking for booty.

• Phaistos Disc

The story about mysterious Phaistos Disc may sound like something from the movie about Indiana Jones. It was discovered by Luigi Pernier, an archeologist from Italy in 1908 in the Minoan palace of Phaistos.
It is believed to be created in the second millennium BC. This is a disc made of clay and contains strange symbols that look like a form of hieroglyphics. Scientists believe that these unknown form of scripture may resemble the symbols of Linear A and Linear B, that were used at the times of ancient Crete. The Linear A eludes the de-encryption. This disc remains one of the most mysterious puzzles of archeology.

• Taos Hum

The Taos hum became famous in the 90’s when a group of citizens of the New Mexico began to complain about a low-frequency noise. This hum was called after the name of town Taos, and people from the other places around in the world have also claimed to hear a similar hum, too. There were similar reports about strange humming in 50’s in several small towns of England. All the tests and researches about the source of the sound gave no results.

• The “Wow!” Signal

The “Wow!” signal was detected in 1977. It was a very powerful radio signal found by SETI. It only appeared once and was never detected again. As for the name, the signal was so powerful that the lead scientist has written the word “Wow” and exclamation point on a printout of it.