Dmitri Mendeleev was a Russian chemist and inventor. He formulated the Periodic Law, created a farsighted version of the periodic table of elements, and used it to correct the properties of some already discovered elements and also to predict the properties of eight elements yet to be discovered.
Alexander Popov was a Russian physicist, one of the inventors of radio.
Andrei Sakharov was a Russian nuclear physicist, dissident, and activist for disarmament, peace and human rights.
Nikolai Lobachevsky was a Russian mathematician and geometer, known primarily for his work on hyperbolic geometry, otherwise known as Lobachevskian geometry and also his fundamental study on Dirichlet integrals known as Lobachevsky integral formula. William Kingdon Clifford called Lobachevsky the "Copernicus of Geometry" due to the revolutionary character of his work.
Konstantin Tsiolkovsky was a Russian and Soviet rocket scientist and pioneer of the astronautic theory. He is considered to be one of the founding fathers of modern rocketry and astronautics. His works later inspired leading Soviet rocket engineers such as Sergei Korolev and Valentin Glushko and contributed to the success of the Soviet space program.
Sergei Korolev worked as the lead Soviet rocket engineer and spacecraft designer. He is regarded by many as the father of practical astronautics. He was involved in the development of the R-7 Rocket, Sputnik 1, and launching Laika and the first human being into space.
Lev Landau was a Soviet physicist who made fundamental contributions to many areas of theoretical physics. He received the 1962 Nobel Prize in Physics for his development of a mathematical theory of superfluidity.
Zhores Alferov is a Soviet and Russian physicist and academic who contributed significantly to the creation of modern heterostructure physics and electronics. He is the inventor of the heterotransistor and the winner of 2000 Nobel Prize in Physics.