The exact number of days to refill the science can be evaluated. Replace x in the following expression with the amount of data that is in the lab, then copy and paste it into google chrome's search bar: -ln((x-100)/x)/0.0027 It will provide the exact number of days required to generate 500 science. Note that the constant 0.0027 is only valid for exactly two level 3 scientists. For other scientist configurations, the constant can be evaluated experimentally with: c = -ln(N1/N0) / t where N0 is the initial amount of data, N1 is the final amount of data, and t is the number of days. -diff