“Nothing tells us more about the spread of humans across the Earth than city lights.”...
"For three weeks spread out over April and October of this year, the Suomi NPP satellite (jointly of NASA and NOAA) scanned all the Earth's land as it appeared at night. Scientists then mapped the satellite's data -- 2.5 terabytes of it -- over an earlier Blue Marble image, transforming that picture's daytime blues, browns, and greens into a nightime palette of blues, blacks, and gold."
This video is a great compliment to the classic Earth at Night composite image as well as the adjusted cartogram for population density.
Questions to Ponder: What do these lights "tell us" about human geography? What does the intensity of the lights indicate?
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