The first woman and the first Jew to be granted a doctorate in physics at the University of Toronto, Mattie Rotenberg also founded Toronto’s first Jewish day school in 1929 to educate her five children. She went on to embark upon a successful second career in journalism.

A self-proclaimed “torchbearer for matrix theory,” Olga Taussky-Todd made the previously little-known field essential for scientists and mathematicians.

Elsa Neumann was the first woman to receive a doctoral degree from the University of Berlin. She became prominent in Berlin’s scientific community, carrying out research for the newly established airship industry. In 1900 Neumann established a highly successful association that gave grants to female students.

Hélène Metzger was a French historian of chemistry and a philosopher of science, whose work remains influential today. Her independence and drive brought her great recognition, despite the lack of credibility given to her as a woman.

Lise Meitner’s influential work concerning radioactivity in the early 20th century made her a target of the Nazis. She fled to Sweden in 1938, and it was there that she discovered the power of the fission reaction. Even though Meitner never worked on nuclear weapons, her 1939 research was essential in the research of nuclear power.

Frustrated with the way math is taught in schools, Lillian R. Lieber created unconventional, popular books to excite young readers and incite their curiosity.

Hilde Levi was an exceptional physicist who worked first in Germany and later in Denmark, where she became a prominent researcher. She belonged to the second generation of women scientists in Germany, who were able to participate on a relatively equal basis in scientific institutions and in academia.

Born in Breslau, Hedwig Kohn was one of the early woman pioneers in physics. After a narrow escape from Nazi Germany, she went on to teach at Wellesley College and pursue independent research at Duke University in the field of flame spectroscopy, measuring absorption features of atomic species in flames.