This week, scientists named a Buddhist monk, and aide to the Dalai Lama, the world's happiest man.
His secret? Meditation.
Neuroscientists wired up 66-year-old Frenchman Matthieu Ricard's skull with 256 sensors four years ago as part of their research on hundreds of practitioners of meditation.
When meditating on compassion, Ricard's brain produced a level of gamma waves "never reported before in the neuroscience literature," neuroscientist Richard Davidson told the AFP.