Leo Tolstoy (left) and the Russian biologist and Nobel laureate Elie Metchnikoff (1845-1916). Metchnikoff, also known as Ilya Ilyich Mechnikov, is best known for his pioneering research into the immune system, for which he won the Nobel Prize in Physiology or Medicine in 1908. He discovered phagocytosis while working at a private laboratory in Messina, Sicily. Leo Tolstoy (1828-1910) was a Russian writer, famous for his novels such as War and Peace (1869) and Anna Karenina (1877), which depicted life in Russia in the 19th century. Photographed in 1909, at Tolstoy's estate of Yasnaya Poliana, near Tula, Russia.
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