Do e-cigarettes really help smokers quit and are they safe?
Kaesong plant reopens in North Korea. Larry Summers no longer in running to be fed boss.
George Packer’s déjà-vu: The American writer speaks about September 11th, Iraq and Syria
Why people choose to abstain from food for religious - and non-religious - reasons
How do we develop a practical, reliable and cheap supply of renewable energy?
“None of these competitors were willing to back off a tenth of a second" Ron Howard
Does this week mark the beginning of the end for the Fed's quantitative easing?
Hamadi Jebali was the first Prime Minister of post-revolutionary Tunisia
The daily drama of money and work from the BBC.
A Catalan who has become one of Spain's most recognisable anti-capitalist campaigners
Larry Summers withdraws from the race to be the new head of the US Federal Reserve
How deep brain stimulation is treating Parkinson's and depression
The latest business and finance news from around the world, on the BBC.
Tuesday 17 September 2013