"All marriages are dangerous," Einstein once told an interviewer. "Marriage is the unsuccessful attempt to make something lasting out of an incident."

Marriage And Great Science Dont' Mix

Several years ago, Satoshi Kanazawa, then a psychologist at the University of Canterbury in Christchurch, New Zealand, analyzed a biographical database of 280 great scientists--mathematicians, physicists, chemists, and biologists. When he calculated the age of each scientist at the peak of his career--the sample was predominantly male--Kanazawa noted an interesting trend. After a crest during the third decade of life, scientific productivity--as evidenced by major discoveries and publications--fell off dramatically with age. When he looked at the marital history of the sample, he found that the decline in productivity was less severe among men who had never been married. As a group, unmarried scientists continued to achieve well into their late 50s, and their rates of decline were slower.

"The productivity of male scientists tends to drop right after marriage," says Kanazawa in an e-mail interview from his current office at the London School of Economics and Political Science in the United Kingdom. "Scientists tend to 'desist' from scientific research upon marriage, just like criminals desist from crime upon marriage."