a) HR diagram showing the evolutionary track of a non-rotating star with initial mass of 60 M_⊙ at metallicity Z = 0.014, using our revised values of T_eff. The color code corresponds to the evolutionary phases of a massive star, with H-core burning in blue, He-core burning in orange, C-core burning in green, and H and/or He-shell burning in gray. b) Similar to a), but color coded according to the spectroscopic phases. Lifetimes of each phase are indicated in parenthesis. c) Evolution of T_eff as a function of age. The color code is the same as in a). d) Surface abundances of H (black), He (red), C (magenta), N (green), and O (blue) as a function of age. e) Mass-loss rate (left axis) and mass (right axis) as a function of age. Color code is the same as in a). f) Central abundances as a function of age, with the same color-coding as in d). Spectral types at selected timesteps are indicated.