The Monadnock is a good place to get a practical sense of how quickly these innovations were catching on: the original northern half of the building consists of traditional load-bearing walls that are 6ft thick at the bottom, while the southern half, constructed only two years later, uses the then-revolutionary metal frame for drastically thinner walls that go just as high.

BBC: The infamous architecture of Chicago

Men and women representing the company have in the past run on the field of play, sometimes half-dressed and sometimes nude, bearing the slogan at the 2002 European Cup football final in Glasgow, this year's Superbowl and the 2003 US Open Golf among other events.

CNN: Tutu diver splashes into spotlight

The only problem was, nobody at the station had an arm small enough to actually reach in through the two-and-a-half inch opening and pack grease around the bearing.

CNN: The 10-year-old who helped Apollo 11, 40 years later

The quizzes had no bearing on the matching, and at this point they are half-hidden on the site.

NEWYORKER: Looking for Someone

Now, it is hard to tell that you are standing in a cemetery -- except for half a dozen grave markers, some made of wood, bearing no names.

CNN: Tracking Michelle Obama's slave roots