An 85-year Harvard study found the No. 1 thing that the world's happiest people have: It helps us 'live longer'
February 10, 2023 at 11:33 AM EST
In 1938, Harvard researchers embarked on a decades-long study to find out: What is the secret to a happy life? Contrary to what think, it's not career achievement, money, exercise, or a healthy diet.