Georgian-Russian biologist, historian and dissident Zhores Aleksandrovich Medvedev (born 1925, right) talking to the Soviet geneticist Vladimir Pavlov

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Georgian-Russian biologist, historian and dissident Zhores Aleksandrovich Medvedev (born 1925, right) talking to the Soviet geneticist Vladimir Pavlovich Efroimson (1908-1989, left). Efroimson worked mainly on the effects of ionising radiation, mechanisms of carcinogenesis and radiation sickness, immunity and neuropsychiatric genetics. Medvedev's work focused mainly on the mechanisms and problems of ageing. He wrote a number of samizdat anti-communist books, which, in 1972, resulted in him having his Soviet citizenship removed while carrying out research in London, UK.

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