Zhores Medvedev

Zhores Aleksandrovich Medvedev (; 14 November 1925 – 15 November 2018) was a Russian agronomist, biologist, historian and dissident. His twin brother is the historian Roy Medvedev. He was born in Tbilisi, Georgia. Medvedev published about 170 research papers and reviews, about sixty of them during his time in London. In 1973 he was one of the signers of the Humanist Manifesto.
Medvedev exposed the Kyshtym nuclear disaster, which happened at Mayak near Kyshtym, Ozyorsk, Chelyabinsk Oblast in the Urals in 1957. He published the book "The Nuclear Disaster in the Urals" in 1979. He and his brother Roy were forced to move to London. The two also coauthored "Khrushchev: The Years in Power" (1978) and several other books, the last one "The Unknown Stalin" (2007).
Medvedev died in London on 15 November 2018 of a heart attack, one day after his 93rd birthday, with his family by his side.