PBS begins this six-part series tonight (U.S.) with Steven Johnson. From preview info, it sounds to be more history and less pop-sci. "...not about otherworldly sights and jaw-dropping discoveries, but about finding the extraordinary in the ordinary." One writer described the manner of presentation as "infinitely watchable". Sounds like it could be a good ride for curious minds. First up tonight (might be a double-episode), "Clean; Time". That's two topics that include histories of clean water, GPS, and on to flight tracking at Heathrow airport.