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.
So how did an intelligent, articulate man with a successful career come to be subjugated by pictures of strangers having sex? With admirable honesty Mike says he's always been fascinated by porn.
Climate scientists are like an exotic tribe - fascinating, sometimes hard to understand and rarely visited.
"They came in and they said: 'Get up, get downstairs, you're under arrest'.â€ A colleague had told the Royal Navy police that Emma was a lesbian.
At Linquenda House, Harare's gloomy immigration department, the official inspecting my visa extension form asks me what I do. "I'm a wineseller," I lie.
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?
In crowded Britain, villages like this would be overrun by city dwellers seeking pretty weekend cottages. But France is littered with beautiful villages â€“ what to do with them all?
On the morning of the first game I heard a familiar voice in the breakfast room. "I'd like a cheese omelette and a rooibos tea." It is the BBC's Jonathan Agnew.
The blurb would have us believe that as Benedict Allen and his team of huskies plunge over a precipice, the author asks himself: 'why do explorers put themselves in such dangerous situations? And â€“ once the worst possible situation occurs â€“ how do they find the resources to survive?â€™