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Marie Charlotte Carmichael Stopes was born in Edinburgh, Scotland, on 15 October 1880 to Charlotte Carmichael Stopes, a suffragist, and Henry Stopes, an archaeologist and anthropologist. A paleobotanist best known for her social activism in the area of sexuality, Stopes was a pioneer in the fight to gain sexual equality for women. Her activism took many forms including writing books and pamphlets, giving public appearances, serving on panels, and, most famously, co-founding the first birth control clinic in the United Kingdom.
The HeLa cell line was the first immortal human cell line that George Otto Gey, Margaret Gey, and Mary Kucibek first isolated from Henrietta Lacks and developed at The Johns Hopkins Hospital in Baltimore, Maryland, in 1951. An immortal human cell line is a cluster of cells that continuously multiply on their own outside of the human from which they originated. Scientists use immortal human cell lines in their research to investigate how cells function in humans.