Lynn met Carl Sagan in college; they were married in 1957, the year she received her bachelor’s degree from the University of Chicago. She obtained a master’s degree in zoology and genetics from the University of Wisconsin in 1960 and received a PhD from the University of California at Berkeley, where she did research in genetics.
Lynn and Carl had two children, Dorion Sagan and Jeremy Sagan. By the time she got her doctorate in 1965, the marriage had ended.
After a postdoctoral period at Brandeis University in Massachusetts, Dr. Margulis began teaching in the biology department at Boston University. After 22 years in Boston, she joined the faculty of the University of Massachusetts at Amherst in 1988. Her obituary in the Washington Post called her "a rebel within the realm of science, whose determined advocacy of her ideas about how new species arise helped change evolutionary biology."
She remarried to scientist Thomas N. Margulis. They had two children, Zachary Margulis-Ohnuma and Jennifer Margulis di Properzio, and divorced in the early 1980s.
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