Hypatia is considered to be one of the last great thinkers of ancient Alexandria and one of the first women to study and teach mathematics, astronomy and philosophy... specifically the works of Plato and Aristotle. Her contributions to astronomy and science include the charting of celestial bodies.
Nakano Takeko is widely considered to be the last great female samurai warrior, and the Battle of Aizu is considered the last stand of the onna-bugeisha. Nakano Takeko died in the ensuing battle, suffering a bullet wound to her chest.
Grace Hopper was born on December 9, 1906 in New York City. At a very young age she showed an interest in engineering, often taking apart household goods and putting them back together. She was named a distinguished fellow of the British Computer Society, then the first person from the U.S. and first woman from any country to hold the title.
Mary Todd Lincoln was wife of the 16th President of the United States, Abraham Lincoln. The two met in Springfield, Illinois in 1839... in his own words, he was “a poor nobody then.” She reportedly managed to save $70,000 of his $100,000 salary during his presidency. During the Civil War, Mary Lincoln became a regular at the newly-established hospitals around Washington, D.C. providing food and comfort to the wounded. Rarely was a kind word printed about her by the press. On Good Friday, April 14, 1865, Abraham Lincoln was assassinated at Ford's Theatre. She uttered in disbelief, "Oh my God, have I given my husband to die?"