In this fascinating TED talk, Gary Wolfe discusses a new hobby which digital technology is giving rise to – people collecting, reviewing and acting upon data about their own lives. With smart phones, as well as the innovative and evergrowing range of applications available for them, it is becoming possible to quantify vast swathes of your everyday life and to do so in a way which is susceptible to review and response. What consequences do these new possibilities hold for being human? Is this something which will remain confined as a passtime for the geeky and curious? Or is it something which heralds real change in the way human beings approach their existence? And what on earth would Foucault have made of it…?