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Joshua Lederberg

Joshua Lederberg
Joshua Lederberg-nih.jpg
Lederberg in New Delhi, India
Born (1925-05-23)May 23, 1925
Montclair, New Jersey
Died February 2, 2008(2008-02-02) (aged 82)
New York City
pneumonia
Nationality American
Fields Microbiologist
Alma mater Stuyvesant High School
Columbia University
Yale University
Known for Neurospora crassa
Bacterial conjugation
Dendral
Astrobiology
Transduction
Notable awards Nobel Prize in Physiology or Medicine (1958)
National Medal of Science (1989)
Presidential Medal of Freedom (2006)
Spouse Esther Miriam Zimmer (1946–1966; divorced)
Marguerite Stein Kirsch (1968–2008; 1 child, 1 stepchild)

Joshua Lederberg, ForMemRS (May 23, 1925 – February 2, 2008) was an American molecular biologist known for his work in microbial genetics, artificial intelligence, and the United States space program. He was 33 years old when he won the 1958 Nobel Prize in Physiology or Medicine for discovering that bacteria can mate and exchange genes (bacterial conjugation). He shared the prize with Edward Tatum and George Beadle, who won for their work with genetics.

In addition to his contributions to biology, Lederberg did extensive research in artificial intelligence. This included work in the NASA experimental programs seeking life on Mars and the chemistry expert system Dendral.

Lederberg was born in Montclair, New Jersey, to a Jewish family, son of Esther Goldenbaum Schulman Lederberg and Rabbi Zvi Hirsch Lederberg, in 1925, and moved to Washington Heights, Manhattan as an infant. He had two younger brothers. Lederberg graduated from Stuyvesant High School in New York City at the age of 15 in 1941. After graduation, he was allowed lab space as part of the American Institute Science Laboratory, a forerunner of the Westinghouse Science Talent Search. He enrolled in Columbia University in 1941, majoring in zoology. Under the mentorship of Francis J. Ryan, he conducted biochemical and genetic studies on the bread mold Neurospora crassa. Intending to receive his MD and fulfill his military service obligations, Lederberg worked as a hospital corpsman during 1943 in the clinical pathology laboratory at St. Albans Naval Hospital, where he examined sailors' blood and stool samples for malaria. He went on to receive his undergraduate degree in 1944.


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