In this interview, Horace Babcock discusses how the field of astrophysics has changed over the course of his career. Topics discussed include: research administration; Mount Wilson Observatory; Ira S. Bowen; National Science Foundation; California Institute of Technology; stellar evolution; photomultiplier tubes; Joel Stebbins; Albert E. Whitford; Gerald Kron; Allan Sandage; Martin Schwarzschild; spectrographs; radio astronomy; x-ray astronomy; galactic evolution; stellar material; Robert McMath; societies; American Astronomical Society; International Astronomical Union; Jan Oort; Theodore Dunham Jr.; Alexander Pogo.