How stress and depression can shrink the brain http://www.dailymail.co.uk/health/article-2187592/How-stress-depression-shrink-brain.html
What Makes Us Happy? http://www.npr.org/2012/04/27/151361554/what-makes-us-happy
Smiling Through the Tears: Study Shows How Tearjerkers Make People Happier http://www.sciencedaily.com/releases/2012/03/120326132533.htm
Why Loneliness Can Be Deadly http://news.yahoo.com/why-loneliness-deadly-163201593.html
Why Are Older People Happier? http://www.psychologicalscience.org/index.php/news/releases/better-research-is-needed-to-understand-why-elders-are-happier.html
Ron Gutman: The hidden power of smiling