Alien Supercivilizations Absent From 100,000 Nearby Galaxies

Astrobiology—the study of extraterrestrial life—has made great strides since its 1960s origins, when the evolutionary biologist George Gaylord Simpson derided it as “a science without a subject.” Today it is booming as never before, driven by perennially high public interest and steadily growing scientific respectability. In a press conference last week two senior NASA officials—Ellen Stofan, the agency’s chief scientist, and John Grunsfeld, the former astronaut and associate administrator for NASA’s science programs—predicted that astrobiologists would at last find their elusive alien subjects within only a decade or two.



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