Harvard scientists have managed to convert a 53,000 word book into DNA, potentially paving the way for DNA to be used as a storage medium. Announcing their breakthrough in the Science journal, the team note that they were able to not only write the book using DNA micro-chips, they were then able to read it using advanced DNA sequencing techniques.
The process remains expensive, but it has certain advantages. First, it should be future-proof since DNA isn’t something that’s likely to become obsolete any time soon; the second is that DNA can last for thousands of years. Beyond that, there are plenty of sci-fi applications of data-as-DNA, though for now those are just the stuff of dreams (or nightmares).