June 2012
Intermediate to advanced
576 pages
19h 10m
English
“Often think of the rapidity with which things pass by and disappear. . . . For substance is like a river in a continual flow, and the activities of things are in constant change, and the causes work in infinite varieties; and there is hardly anything which stands still.”
—The Meditations, by Marcus Aurelius1
If you were capable of watching all of the automobiles driving on the roads within a geographic area, mapping sources and destinations, volumes of people and objects moved, and directions of transfer, you would be able to tell quite a lot about the activities of the people in the area. Not only could you make broad statements about the general habits of all the people, you could also identify areas of ...
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