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| | Sir Peter Brian Medawar (Site not responding. Last check: 2007-10-11) |
 | | Medawar lent support to this theory when he found that fraternal cattle twins accept skin grafts from each other, indicating that certain substances known as antigens "leak" from the yolk sac of each embryo twin into the sac of the other. |
 | | Medawar was professor of zoology at the universities of Birmingham (1947-51) and London (1951-62), director of the National Institute for Medical Research, London (1962-71), professor of experimental medicine at the Royal Institution (1977-83), and president of the Royal Postgraduate Medical School (1981-87). |
 | | Medawar's works include The Uniqueness of the Individual (1957), The Future of Man (1960), The Art of the Soluble (1967), The Hope of Progress (1972), Life Science (1977), Pluto's Republic (1982), and his autobiography, Memoir of a Thinking Radish (1986). |
| www.alenasites.com /medawar/medawar.html (348 words) |
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