In regard to your article on scientists living longer,1 could it be that scientists are just tougher all round? A similar argument (with apologies to those who are married) might explain why married people live longer than singles: They are just tougher; the less tough can't stand marriage and become (or stay) single.
Leonard X. Finegold
Physics Department
Drexel University
Philadelphia, Pa.
L@drexel.edu