A new documentary follows three teenagers making a long trek back to families in Nepal.
The school children who leave home for over a decade
Facebook keeps growing despite privacy probe
$3bn set aside to cover the potential costs of an investigation into privacy practices.
A tale of food and loss.
How can we feed 11 billion people?
The challenge to produce enough food to feed our growing population
Taking your calls through the night.
Rhod Sharp with news, interviews and stories from around the world.