Quakes, bad indoor air, and will we be eating bacteria in future?

Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs.Why Turkey can expect aftershocks for up to a year, as we examine the science behind this week's massive earthquake. Plus encrypted letters from Mary Queen of Scots decoded, efforts to drive up indoor air standards, and the revolutions in farming and food production to make food cheaper.