Fig. 1.

Age of great achievement over time and by field. (A) The mean age at which Nobel Laureates produced their prize-winning work in physics, chemistry, and medicine across all years (Whole) and in the early period (through 1905) and late period (from 1985). (B Upper) The change in mean age of great achievement between the early and late periods within each field. (B Lower) For each pair of fields, the difference between fields in the mean age over all years. (C) The rank ordering of the fields by mean age for the whole period, early period, and late period (1 indicates lowest mean age, and 3 indicates highest mean age). SEs are given in parentheses. **significance at 5%; ***significance at 1%.