Dmitri Mendeleev - the Periodic Table of Elements, Andrei Sakharov - the Soviet hydrogen bomb , Nikolai Lobachevsky - non-Euclidean geometry, Ivan Pavlov - Discovery of the conditioned reflex, pioneering the field of classical conditioning, Konstantin Tsiolkovsky - The founding theoretical father of rocket science and human spaceflight, Mikhail Lomonosov - The discovery of the atmosphere of Venus, the law of conservation of mass in chemical reactions,

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