The 144 words of Robert Frost’s seminal poem “The Road Not Taken” fit neatly onto a single printed page or a 1 kilobyte data file. Or in Hyunjun Park’s hands, a few drops of water in the bottom of a pink Eppendorf tube. Well, really what’s inside the water: invisible floating strands of DNA. Scientists have long touted DNA’s potential as an ideal storage medium; it’s dense, it’s easy to replicate, it’s stable over millennia.