In fact, the researchers said that within a year of these events, an average of 11 percent of the material that was linked to had disappeared completely (and another 20 percent had been archived), and after two-and-a-half years, close to 30 percent had been lost altogether and 41 percent had been archived. Based on this rate of information decay, the authors predicted that more than 10 percent of the information about a major news event will likely be gone within a year, and the remainder will continue to vanish at the rate of .02 percent per day.