How old were you when you gave your first talk at a conference?
I got my PhD in 1977 at age 35.
.... did you ever find that earning your PhD at a later age was a hindrance to your career?
No - it just means that after 45, it's pretty much down hill.Mathwonk. ..you approached 65 faster..but doesn't that mean you got to focus on research after 65? I just see my old professors wandering around teh libraries reading.