When is a scientist not really a scientist? This the provocation launched by Nature last week.

For many people, whoever has a PhD in Molecular Genetics or in Physics can rightfully exhibit this ‘title’. But for others, science is something that you ‘do’, not just something you learnt. According to the purists, then, those who leave the lab after a post-graduate education, in order to work somewhere else, have lost their way and have been seduced by the dark side.