In "Soul Hunter," Franklin notes that the average human life span is
now about a hundred years. It's quite a bit longer for the other races;
G'Kar is about 70 or more, but is considered mid-range, equal to a human
in early 40s, among Narns. Delenn is in about the same position, equal to
30s-40s in her terms, but in years a bit older. They are a pretty long
lived people. Centauri aren't quite as long-lived, but they do a bit
better than the Narns. The Vorlons......are.