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http://metropolitanbystander.blogspot.com/

20aliens:

Stefan Glerum
ephemeralol:

Oscar Niemeyer
visualobscurity:

Alfred Stieglitz, Georgia O’Keeffe, Hands and Horse Skull, 1931
pixography:

Robert Silverberg, "The Book of Skulls", 1972  [uncredited cover art]
(via elcilantroo)