61. Ellen Swallow Richards
Dates: December 3, 1842 – March 30, 1911
Known for: Ellen Swallow Richards was the first woman in the United States to be accepted at a scientific school. A chemist, she's credited with founding the discipline of home economics.
63. Florence Sabin
Dates: November 9, 1871 - October 3, 1953
Known for: Called the "first lady of American science," Florence Sabin studied the lymphatic and immune systems. She was the first female to hold a full professorship at Johns Hopkins School of Medicine, where she had begun studying in 1896. She advocated for women's rights and higher education.
64. Margaret Sanger
Dates: September 14, 1879 - September 6, 1966
Known for: Margaret Sanger was a nurse who promoted birth control as a means by which a woman could exercise control over her life and health.
65. Charlotte Angas Scott
Dates: June 8, 1858 - November 10, 1931
Known for: Charlotte Angas Scott was the first head of the mathematics department at Bryn Mawr College. She also initiated the College Entrance Examination Board and helped organize the American Mathematical Society.
66. Lydia White Shattuck
Dates: June 10, 1822 -
Known for: An early graduate of Mount Holyoke Seminary, Lydia White Shattuck became a faculty member there where she remained until her retirement in 1888, just a few months before her death. She taught many science and math topics, including algebra, geometry, physiolgy, physics, astronomy and natural philosophy. She was internationally known as a botanist.
67. Mary Fairfax Somerville
Dates: December 26, 1780 - November 29, 1872
Known for: Mary Somerville was one of the first two women admitted to the Royal Astronomical Society. She was dubbed "Queen of Nineteenth Century Science" by a newspaper on her death. Somerville College, Oxford University, is named for her.
68. Sarah Hackett Stevenson
Dates: February 2, 1841 - August 14, 1909
Known for: Sarah Stevenson was a pioneer woman physician and medical teacher, a professor of obstetrics and the American Medical Association's first female member.
69. Alicia Stott
Dates: June 8, 1860 - December 17, 1940
Known for: Alicia Stott was a mathematician known for her models of three-dimensional geometic figures.
70. Shirley M. Tilghman
Dates: 1946 -
Known for: A Canadian molecular biologist with several prestigious teaching awards, Tilghman worked on gene cloning and on embryonic development and genetic regulation. In 2001, she became the first woman president of Princeton University.

