From Our Own Correspondent

Paper money is going out of fashion in China, but is the rise of mobile payments about convenience or control, asks Celia Hatton?Mark Lowen reflects on the 5 years he has spent reporting from Istanbul and beyond.Juliet Rix travels to the far east of Russia, where she finds a community trying to reconcile tradition with modern-life.'Gravity biking' involves hurtling down precipitous mountain roads on specially-modified bikes. Simon Maybin meets a group of 'gravitosos' in Colombia and finds they have a complicated relationship with death.Presented by Caroline Wyatt.