#22 The Voynich Manuscript
The Voynich Manuscript, a 250-page long book, is strangely written in a writing system or language that is unknown. While it dates back to the early 1400s, it also comprises drawings of strange plants.
To date, this manuscript has not been understood or explained by anyone.
However, researchers say that it was probably authored by Roger Bacon or Albertus Magnus, according to reports published by Voynich.
Modern-day scientists claim that this manuscript perhaps contains medical texts that are written in an ancient script.