I went skydiving today for the first time.
This guy strapped himself to me, we jumped out of the plane.
As we plummeted he said, "So how long have you been an instructor?"
John J. BittnerDied 14 Dec 1961 at age 57 (born 25 Feb 1904).John J(oseph) Bittner was an American geneticist who isolated a "Bittner milk factor" (1949) from the milk of certain mice, which strongly suggested that at least some viruses can cause cancer. Using carefully bred strains of mice, he compared the role of the mother's genetic disposition to be either prone to cancer or resistant. By having the mice of one disposition act as foster mothers and nurse the babies of the other disposition, he showed that cancer-prone young could grow to be cancer resistant. The opposite was also true: babies originally cancer-resistant became cancer prone. He published this observation (1936), and went on to isolate particles of a virus-like size from the milk of cancer-prone mice that were not present in the milk of cancer-resistant mice. |
