Alice Hamilton

1869-1970, USA
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– Established the field of industrial hygiene and occupational epidemiology.
– Work led to major legal, economic and social change.
– First woman faculty member at Harvard University.

Graphic by Racehell Sumpterrachellsumpter.com
Alice Hamilton (February 27, 1869 – September 22, 1970) was a leading expert in the field of occupational health and the first woman appointed to the faculty of Harvard University. She was a pioneer in the field of toxicology, studying occupational illnesses and the dangerous effects of industrial metals and chemical compounds on the human […] read more

Helen Sawyer Hogg

1905-1993, USA/Canada
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– Performed pioneering research into globular clusters and variable stars.
– Wrote astronomy column in Toronto newspaper for 30 years.
– Travelled widely for her work (especially observing stars in the southern hemisphere).

Graphic by Rachell Sumpterrachellsumpter.com
Helen Battles Sawyer Hogg, CC (1 August 1905 – 28 January 1993) was an astronomer noted for pioneering research into globular clusters and variable stars. She was the first female president of several astronomical organizations and a notable woman of science in a time when many universities would not award scientific degrees to women. Her […] read more

Euphemia Haynes

1890-1980, USA
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– First African-American woman to earn a PhD in math (she also had a Masters in Education).
– Taught elementary school and high school.
– First woman chair of the Washington D.C. School Board.

Graphic by Shannon Wrightshannon-wright.com
Martha Euphemia Lofton Haynes (September 11, 1890, Washington, D.C. – 25 July 1980, Washington, D.C.) was an American mathematician and educator. She was the first African-American woman to gain a PhD in mathematics, from the Catholic University of America in 1943.[1] read more

Sylvia Olga Fedoruk

1927-2012, Canada
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– Helped develop the first cobalt-60 unit and one of the first medical nuclear scanners.
– Was the Lieutenant Governor of Saskatchewan, Canada from 1988-1994.
– Her personal coat of arms has pictures of atoms.

Graphic by Shannon Wrightshannon-wright.com
Sylvia Olga Fedoruk [Fe-doruk], (Ukrainian: Федорук), OC SOM (May 5, 1927 – September 26, 2012) was a Canadian physicist, medical physicist, curler and the 17th Lieutenant Governor of Saskatchewan. read more

Sally Ride

1950-2012, USA
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– The first American woman in space.
– Also the youngest astronaut, and the earliest known LGBT astronaut.
– Advocated for NASA to focus on problems directly facing humanity.

Graphic by Shannon Wrightshannon-wright.com
Sally Kristen Ride (May 26, 1951 – July 23, 2012) was an American physicist and astronaut. Born in Los Angeles, she joined NASA in 1978 and became the first American woman in space in 1983. Ride was the third woman in space overall, after USSR cosmonauts Valentina Tereshkova (1963) and Svetlana Savitskaya (1982). Ride remains the […] read more

Inge Lehmann

1888-1993, Denmark
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– Discovered that the earth has a solid inner core inside by a molten outer core.
– She was the first head of the Department of Seismology at the Geodetical Institute of Denmark.

Graphic by Ele Willoughbyminouette.etsy.com
Inge Lehmann ForMemRS (13 May 1888 – 21 February 1993) was a Danish seismologist and geophysicist. In 1936, she discovered that the Earth has a solid inner core inside a molten outer core. Before that, seismologists believed Earth’s core to be a single molten sphere, being unable, however, to explain careful measurements of seismic waves […] read more