US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY
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Leon Max Lederman (born 1922), US particle physicist, with an Albert Einstein doll (lower left). Lederman was the leader of the team which discovered the upsilon meson in 1977. This particle was the first found to contain the bottom quark. The particle was discovered at the Fermi National Accelerator Laboratory (Fermilab) near Chicago. Lederman was appointed director of the laboratory in 1979. In 1988, Lederman shared the Nobel Prize in Physics for his discovery.
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