The Dark Side of the Moon...explained in ten seconds...

Mapping Our World

NASA satellites have been mapping Earth for over 40 years. These global observations of the atmosphere, biosphere, land surface, solid Earth, and ocean enable an improved understanding of the Earth as an integrated system. The images above feature data from over a dozen Earth observation missions. 

http://nasaesw.strategies.org/interactive/

http://nasaesw.strategies.org/mapping-our-world-poster/