How do you best represent the complex New York City subway system on an easy-to-read map? That's a challenge John Tauranac has been working on since the 1970s, when he chaired the MTA's subway map ...

When it comes to maps—a technology that is 4,000 years old—two completely contradictory things are true: Nothing has changed. And everything has changed. What hasn’t changed is maps are a language.

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