Taking Electricity to Rural Africa

Rural electrification is a big problem in Africa, with much of the continent "off grid". This week, we meet the bright sparks developing energy kiosks, who charge and maintain batteries for use in rural areas. In the news, why young people are more likely to fall victim to the flu, how a dose of worms controlled a man's inflammatory bowel disease and why the discovery of arsenic-loving bacteria is forcing us to rethink the chemistry of life. Plus, in Question of the Week, Diana gets to the bottom of whether it's possible to drink through your rectum...