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In page Haroun Tazieff:

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His parents met and married in 1906 while they were both students in Brussels. They later returned to Warsaw, Russian Partition where their first son, Salvator, died at two months and where Haroun was born. His father, Sabir, was a Muslim medical doctor, of Tatar descent and his mother, Zenita née Klupt, was a Polish Jewish chemist and doctor of Natural science and holder of a Bachelor's degree in Political science. His father was conscripted into the Russian Army and died during the First world war, a fact that did not reach the family until 1919. In 1917 Haroun emigrated to Brussels with his widowed mother.