Notes &
![Day and Night [PIC]
The population density of New York during the day, versus the population density at night.](http://24.media.tumblr.com/tumblr_kokm734s0i1qz5qdso1_500.jpg)
The population density of New York during the day, versus the population density at night.
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Notes &
The population density of New York during the day, versus the population density at night.
