Data visualization expert John Nelson has made a fascinating map of New York City. It portraits the gender flow of the city, showing where men (blue) and women (pink) live from birth to death. I had no idea that gender density changed so much as the population ages. Some of the reasons for these inner city migrations are logical but others are puzzling.
https://gizmodo.com/this-map-of-gender-segregation-shows-how-new-yorkers-li-1444927574
