the science of happiness
http://www.oculture.com/2009/01/the_science_of_happiness.html http://www.oculture.com/2008/10/creativity_flow_and_the_source_of_happiness.html
how your friends’ friends can affect your mood
harter tobak, aber interessant darüber nachzudenken und darüber zu philosophieren… ;o) http://www.newscientist.com/article/mg20126881.600-how-your-friends-friends-can-affect-your-mood.html?full=true