Dr. May, if I may

In the ripe old age of 60 Brian May - guitarist in Queen - finished his Ph.d. in astrophysics with a paper on space dust and may now call himself Dr. May.

(actually he allready could because he had an honorary degree)

Most schools have policies limiting the time between the start and completion of a Ph.D. to ten or twelve years. Perhaps Imperial College London has no such policy, or perhaps they overlooked it in this case cause they think Fat Bottom Girls really rocks.