Could super grids supplying DC electricity be the solution to rising demand for energy?
Arn Chorn Pond's musical skills enabled him to survive the Khmer Rouge regime in Cambodia
I Wish I Knew How it Would Feel to be Free became an anthem for the American Civil Rights
What are business schools teaching; have lessons been learnt from the financial crisis?
Best-selling novelist and forensic scientist Kathy Reichs, on telling stories from bones.
The daily drama of money and work from the BBC.
The latest business and finance news from around the world, on the BBC.
The near future is imagined at the Brighton Digital Festival
The legacy of the great New Orleans piano player James Booker - aka the Black Liberace