"Gertrude Belle Elion (January 23, 1918 – February 21, 1999) was an American biochemist and pharmacologist, and a 1988 recipient of the Nobel Prize in Physiology or Medicine. Working alone as well as with George H. Hitchings, Elion developed a multitude of new drugs, using innovative research methods that would later lead to the development of the AIDS drug AZT." [source, wikipedia]

Ada Lovelace, born December 10th, 1815, is an English mathematician and writer known for her work on Charles Babbage's Analytical Engine (early computer). She is considered the first computer programmer!

About the Scientista 
Mary Leaky was a British paleoanthropologist who is best known for her discovery of the first fossilized Proconsul skull, an extinct ape that is now believed to be an ancestor to humans.

Maria Mitchell was the first woman to work as a professional astronomer. Maria Mitchell became famous in 1897 for discovering a comet known as "Miss Mitchell's Comet". Read more about her here:http://en.wikipedia.org/wiki/Maria_Mitchell