Big Science FM: It's a Small World after all

In 1929, Frigyes Karinthy wrote a short story suggesting that everyone is connected to everyone else by six or seven degrees of separation. In 1967, Stanley Milgrim did an experiment proving it. And twenty years later, Duncan Watts & Steve Strogatz build the mathematics to describe it. We talk to Samuel Hansen about why this means our friends are more popular than we are.