The Voynich Manuscript is one of the oldest undecipherable texts in the world. Purchased, in Italy, by Wilfred Voynich in 1912, this 240 page book is carbon dated to the early 1400's and seems to describe herbal medicines (though most of the plants are not recognizable).
One of 10 Unexplained Discoveries (Video)
One of 10 Unexplained Discoveries (Video)
