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Natasha Mitchell

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George Wallace Kidder

Born 9 Dec 1902; died 1996 .American biochemist who demonstrated that a chemical distinction exists between tumorous and normal cells. He was a protozoologist for a number of years in his early career. His study of tetrahymena, a one-cell, pond ciliate with a basic biochemical pattern in most respects resembling that of human cells, led to his discoveries in abnormal growths and, ultimately, in cancerous cells. In spring of 1949, Kidder and his associates discovered that azaguanine, a metabolic analog of guanine, would inhibit the growth of certain forms of cancer and leukemia in mice without injuring the normal cells of the host. (Subsequently, other researchers found to be unsuccessful in cancer treatment of humans, even toxic.)

Harry and his neighbor Joe oft...

Harry and his neighbor Joe often borrowed things from each other. One day, Harry asked to borrow Joe's ladder.
Joe said, "Sorry Harry, I've lent it to my son."
Remembering a saying that his grandma often used to tell him, Harry said, "Joe, you should never lend anything to your children because you'll never get it back."
Joe replied, "Don't worry, it's not my ladder - it's my dad's."
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