Night Lights

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The most urbanized areas of the Earth show as the brightest at night, yet these are not necessarily the most populous areas. Urbanization tends to follow coastlines and transportation networks.

Earth at Night image courtesy of Marc Imhoff (NASA/GSFC) and Christopher Elvidge (NOAA/NGDC). Image by Craig Mayhew (NASA/GSFC) and Robert Simmon (NASA/GSFC).