February 11, 2016 at 2:24 pm
What Researchers Learned from the World’s Longest Study on Happiness
![What Researchers Learned from the World's Longest Study on Happiness](https://twistedsifter.com/wp-content/plugins/lazy-load-0.7/images/1x1.trans.gif)
Psychiatrist Robert Waldinger is the 4th director of the ongoing, 75-year-old study on adult development and happiness. This is what they’ve learned