I thought I would reflect here on a theme most scientists enjoy recalling: the part luck played in their accomplishments.
I owe much to my friends; but, all things considered, it strikes me that I owe even more to my enemies. The real person springs life under a sting even better than under a caress.
The global phenomenon of poverty tourism - or 'poorism' - has become increasingly popular during the past few years. Tourists pay to be guided through the favelas of Brazil and the shantytowns of South Africa. The recently opened Los Angeles Gang Tour carries visitors through battle-scarred territor

