This week, is sugar the enemy? Difficult as it is to digest, one person in every four in the UK is obese, and treating the condition as well as its knock-on effects, costs the health service 5.1 billion per year. Some say sugar is to blame, but is it the only guilty party? Plus, in the news, pigeons detecting cancer, half of museum specimens might be mislabelled, and how science journals are being hacked...