I knew it

Scientists find that people who are cheerful and optimistic tend to die younger.

Researchers in the Longevity Project studied 1,500 bright children who were around 10 years old when the study began in 1921. They found, over the subjects' lifetimes, that happy-go-lucky types took more risks with their health, trusting that everything would turn out fine.

Prudent, persistent types tended to live longer and be healthier, the researchers found.

Full story here.

(Thanks to Bill Crider for the link.)