Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A trio of ...

A trio of codebreakers has found and deciphered a treasure trove of lost letters written by Mary, Queen of Scots. The 57 secret letters, from Mary Stuart to the French ambassador to England between ...

Sam Blake, an Australian mathematician, first learned of the Zodiac Killer’s unsolved ciphers — a series of encrypted messages — from a documentary in the 1990s. His interest marginally increased in ...

The Voynich manuscript has long been shorthand for the unsolved and the unknowable, a late medieval codex filled with looping glyphs that refuse to yield a single clear sentence. A new cryptologic ...

A mysterious manuscript dating back to the 15th century could be a type of encrypted message, a new study has suggested. The ...