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In page Carl Sagan:

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Sagan was married three times. In 1957, he married biologist Lynn Margulis. The couple had two children, Jeremy and Dorion Sagan. Their marriage ended in 1964. Sagan married artist Linda Salzman in 1968 and they had a child together, Nick Sagan, and divorced in 1981. During these marriages, Carl Sagan focused heavily on his career, a factor which may have contributed to Sagan's first divorce.[1] In 1981, Sagan married author Ann Druyan and they later had two children, Alexandra (known as Sasha) and Samuel Sagan. Carl Sagan and Druyan remained married until his death in 1996.[citation needed]