Gypsy's point is that some of the theories and hypothesises mentioned in the Koran (that are listed in the original post by realsomeone) existed before the Koran was written. Their form doesn't matter, they were passed through generations by word of mouth and by written word.

For your information, the Papyrus plant was processed by Egyptians and used to write on in the third millennium BC. Parchment was created from animal skins around the first century BC, which were folded into book-form.