Medicine: Life Doesn't Begin at 40

The belief is widespread that while boxers and big-league ballplayers are old at 40, that is just the age when giants in the arts and sciences begin to hit their stride. Not so, says Ohio University's Professor Harvey C. Lehman in Age and Achievement (Princeton University; $7.50). In nearly every field of creative activity, claims Psychologist Lehman, the greatest men register their greatest achievements* by the time they are 40.

Science. In chemistry, Dr. Lehman finds, the most creative thinkers did their best work in the age range from 26 to 30; in mathematics,...

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