Word: tenuously
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Dates: during 1950-1959
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...future "where people are even more different from one another than they are now," Riesman concluded, "national character may become an even more tenuous concept than at present...
...from the farm towns to Topeka, where labor's C.O.P.E. is battling right-to-work. And in the Third District (in southeast Kansas, where lead and zinc mines are on their uppers), the Fourth District (including industrial Wichita) and the Sixth District (where Isolationist Wint Smith holds highly tenuous reign), Republican incumbents have no time for coasting...
...surface with radioactive debris. Almost as bad would be the big, backward-pushing retrorockets that would be needed to bring a small packet of instruments to a soft landing on the moon; they would require the release of so much burned fuel that the moon's tenuous atmosphere would never be the same again...
...Sullivan's modest sphere would not be conspicuous to the naked eye, but it could be picked up easily with low-power moonwatch telescopes. Its great virtue would be its short life. Even on a comparatively high orbit, the tenuous bubble of nothing would be slowed by faint traces of air on the threshold of space. Following a circular course 300 miles above the earth, it would live for only about ten days, and its rapid changes of speed and altitude would measure air density much more accurately than the slow responses of heavier satellites...
...catch its important ultraviolet and X rays, which do not penetrate to the surface, balloons soar high in the air and rockets climb to the top of the atmosphere on a regular schedule. Special instruments watch the sun's glowing outer corona, which may extend as a tenuous gas all the way to the earth...