Biology's greatest software revelation required little more than bacteriophages, radioactive isotopes, and a humble kitchen blender. On September 20, 1952, Alfred Hershey and Martha Chase published the definitive results proving that DNA—not protein—carries the blueprint of life. Prior to their experiment, the scientific consensus bet heavily on complex proteins, assuming nucleic acids were far too structurally simplistic to handle biological computing. By selectively tagging viral DNA with radioactive phosphorus and protein coats with sulfur, Hershey and Chase demonstrated that only DNA entered the host bacterium to hijack its machinery. The finding proved that nature's operating system runs on nucleic acids, directly paving the runway for Watson, Crick, and Franklin to resolve the double helix months later. In a single stroke, Hershey and Chase reframed biology as an information science, ready to be decoded.