Technology, Books and Other Neat Stuff

Thunder is rumbling around South London, and the heavens have opened, cooling things down nicely after a busy day involving furniture construction, an interesting press event, and a hot afternoon's shopping for this year's summer wardobe...

But, as marypcb and I were walking back down the road from the tube station it was just starting to spit with rain, leaving us with a question that keeps coming back: what is it that makes that lovely smell of rain on warm pavements?