Are we too dependent on metals and minerals that are increasingly hard to get hold of?
Why improvising comes naturally to all of us.
Talk back to the BBC and challenge the programme makers.
Evan Davis explored the impact of the digital revolution on the book industry.
Reporting tragedy and celebration - a journalist reflects on a week of extremes in Brazil
How Vietnam War experience shaped the view of Secretary of Defense nominee Chuck Hagel
Electrical charges in the human body - what are the implications for disease and cures?
William Crawley tells the story of the Catholic priest behind the Big Bang Theory.
Mike Williams peers into the world of black and asks why it has so many different meanings
A Harvard professor alleges bias in Google Ads
Monday 11 February 2013