Word: hayflick
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Dates: during 1970-1979
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...master clock and perhaps use that precious knowledge to slow it or even stop it. One locale for the clock (if there is indeed only one) may be within the smallest unit of life, the cell. Growing normal embryonic cells of various species in a test tube, Biologist Leonard Hayflick has made an astonishing finding: they are not immortal, as scientists believed from early experiments, in which a single cell line had been cultivated for years, but have definite life spans...
...slip into the vaccine with unpredictable effects on the human recipient. One stray monkey virus has turned up in some vaccine samples. Many virologists believe that it would be better to make the vaccine from viruses grown in human cells, specifically in a strain developed by Dr. Leonard Hayflick and Dr. Paul S. Moorhead. Originally derived from the lung tissue of a Swedish aborted fetus, this strain is pure, will reproduce itself 50 times and allows a huge yield of cellular material. Britain already uses polio vaccine produced in these cells, and the U.S.S.R. is switching...