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An observant reader points out that on this day in 1967, Manhattan's first air-conditioned subway went into service. Surprisingly, the lucky train was the F. No, that's not a typo: The F line (or the hipster-ghetto lovecoaster, as we like to call it) used to be the nice one. This, of course, has us wondering what sort of warped New York universe existed in during the wonder years, when the F train was the fancy, shiny one — as opposed to dimly lit, medium-speed orange litter mover of today.

This Day in History [NY1]