This article is reposted from the old Wordpress incarnation of Not Exactly Rocket Science. The blog is on holiday until the start of October, when I'll return with fresh material.
In 1979, a crucified Eric Idle advised movie-goers to always look on the bright side of life. It seems that he needn't have bothered. Psychological experiments have consistently shown that as a species, our minds are awash with a pervasive optimism.
