Isaac Asimov: The Dead Past. Summary
In a future where scientific research is controlled by the government, Professor of History Arnold Potterley seeks access to the chronoscope, a device that allows images of the past to be viewed, in order to study ancient Carthage, but his request is denied. Frustrated, he persuades the young physicist Jonas Foster to investigate Neutrinics, the scientific basis of chronoscopy. Foster discovers a more efficient method for building chronoscopes and constructs one, but reveals that it can observe only up to one hundred and twenty-five years into the past. When Potterley’s wife wishes to use the device to see her deceased daughter, Potterley destroys it. He then informs on Foster to the authorities in order to prevent the dissemination of the discovery; however, Foster’s uncle has already sent the plans to multiple publishers. The head of Chronoscopy then reveals the devastating truth: the chronoscope can observe not only the dead past but also the immediate present, so its widespread use would mean the absolute end of human privacy.