For those of you not familiar with the Voynich Manuscript, which I suspect is most of you - the Voynich Manuscript is a centuries-old book of an undecipherable language. Most historians agree that it was written between 1450 and 1520, because of the clothes that the figures drawn in the book wear. It contains eerie illustrations, particularly of plants that do not resemble those we have currently documented on Earth. There are also diagrams that appear to be astronomical in nature, inlcuding our solar system and what appears to be a galaxy, which would have required a telescope far more advanced than those of the period it was supposedly written in. Interestingly, there are also diagrams of what appear to be cells drawn when viewed under a microscope. If it was indeed written in 1450 - 1520, this would have been nearly 200 years before cells were supposedly first viewed underneath a microscope.
Besides the illustrations, the text is baffling - not one word has been deciphered. Some handwriting experts who've examined the writing agree that the author's words flowed smoothly onto the page, and therefore he knew what he was writing - it's not gibberish. It also follows Zipf's law, which is a law observed in all modern language where the most frequent word will occur approximately twice as often as the second most frequent word, which occurs twice as often as the fourth most frequent word, and so on, further disproving the idea that the book is a hoax.
Not much is known about the history of the book, especially it's early history - we know only that the earliest owner was a man named Georg Baresch who lived in the early 17th century. Over the year, it went from owner to owner and today it is currently in the possession of Yale University.
Download the book (pdf)