In 1990, Howard Friedman and Leslie Martin, two psychologists at the University of California, Riverside, embarked on a research project within a research project, seeking answers to the question, 'What makes for a long life?'

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“In 1990, Howard Friedman and Leslie Martin, two psychologists at the University of California, Riverside, embarked on a research project within a research project, seeking answers to the question, 'What makes for a long life?'”