What do cars actually emit in the real world? It's not easy to find out. What started close to home - will my old banger's petrol engine be better or worse than my father's 2009 diesel - led to an emissions investigation with a troubling discovery about recent models.
At Samphire Beach, a Japanese woman stands in front of Dover's white cliffs. It is 10 past seven on a Tuesday morning. Most people will be having breakfast or getting ready for a day at the office. Miyuki Fijita is swimming to France.
The Paedophile Information Exchange was affiliated to the National Council for Civil Liberties - now Liberty - in the late 1970s and early 1980s. How did pro-paedophile campaigners operate so openly?
The Parexel unit is a strange and private outpost within the sprawling concrete compound that is Northwick Park Hospital. It is basically one long corridor with seven or eight wards running off it, each containing half a dozen beds.
Lower Farm, just outside Chesterfield, is not what most of us would think of as a farm. It is run by a poultry company called Applied Group. Everything happens in four large sheds. Nearly all chicken meat eaten in the UK comes from a place like this.
Britain's equivalent of Oktoberfest comes far closer to being a real beerfest, although it, too, is built on a glaring contradiction.
Before dawn on 5 July 1943 explosions lit up the Russian sky and the earth shook to a huge bombardment. As the sun rose, waves of German panzers began rolling across fields of sunflowers and wheat.
It may look like a sewage works on a choppy day but in the glorious jargon of London 2012 this is an "early legacy".
'They put a gun to the back of my head. I heard them cock it. It jammed'
Up close it looks like a normal, if rather high-powered, literary event. We're in the hall of the British Library. On stage is Mark Lawson, the nation's undisputed master of cultural ceremonies, holding aloft a new book and chatting breezily to the thirtysomething celebrity author sitting alongside him.