SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Igor Vasilyevich Kurchatov (1903-1960, left) and Abram Fedorovich Ioffe (1880-1960, right), Soviet physicists. In the 1930s, Kurchatov supervised the construction of what was then the world's largest cyclotron particle accelerator. He also led the work on the USSR's first atomic bomb (1949), hydrogen bomb (1953) and the world's first nuclear power plant (1954). Ioffe (sometimes spelt Jaffe) studied electromagnetism, radiology, and semiconductors. He also oversaw the expansion of work in radioactivity, superconductivity and nuclear physics. In 1918, he became the head of what is now called the Ioffe Physico-Technical Institute in his honour. Photographed in Russia.
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