Born on June 27

Augustus De Morgan was a 19th-century British mathematician and logician. A pioneer of modern formal logic, he helped found the algebra of logic and gave his name to De Morgan's laws, which are fundamental to logic and set theory.

Emma Goldman (1869-1940) was a Lithuanian-born anarchist and feminist activist who emigrated to the United States. A leading figure in the American labor movement, she championed individual freedom, women's emancipation, and opposed war and capitalism.

Deaf-blind since the age of 19 months, Helen Keller learned to communicate thanks to her teacher Anne Sullivan and became a writer and activist. She devoted her life to defending the rights of people with disabilities and women.

American geneticist and botanist, Harriet Creighton is celebrated for her landmark experiment conducted with Barbara McClintock in 1931, proving that genetic crossing-over corresponds to a physical exchange between chromosomes. She taught botany at Wellesley College for decades.

French actress born in 1955, daughter of an Algerian father and a German mother. Launched to stardom by François Truffaut in *The Story of Adele H.* (1975), she portrays passionate and tormented women in *Possession*, *Camille Claudel*, and *Queen Margot*. Holder of a record five César Awards for Best Actress.