Joshua Lederberg ForMemRS[1] (May 23, 1925 – February 2, 2008)[2] 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) work that was conducted alongside his wife Esther who was uncredited for her contributions.[3] He shared the prize with Edward Tatum and George Beadle, who won for their work with genetics.