The Documentary Podcast: Archive 2013 BBC World Service

Graphene is a super-strong and super-conductive material. Gerry Northam looks at its move from the laboratory to the commercial world.

The US Federal Reserve, America's central bank, is one hundred years old. Simon Jack tells its surprising story.

Brazil's anti-slavery hit-squads are unique. Linda Pressly joins a raid with a committed band of labour inspectors on an alleged slave labour operation in deepest rural Brazil.

Childcare options in Fiji, where children are taken care of by the community, and China where infants as young as three might live away from their parents in boarding kindergartens. Madeleine Morris reports.

The emerging Jihadi challenge across the Sahara and Sahel regions of Africa. Are there links between various Islamist groups?

Farhana Haider investigates the prosecution of alleged war criminals from the conflict of 1971 and asks if the trials are being used to target the opposition.