Mae Carol Jemison (born 17 October 1956) is an American physician and NASA astronaut. She became the first African-American woman to enter space when she served on the crew of the Space Shuttle Endeavor in September 1992. Jemison graduated high school at the age of 16. She studied at Stanford University on a scholarship where she got a Bachelor of Science in chemical engineering. After graduating from medical school (Cornell University, 1981), Jemison joined the Peace Corps. She served as its area medical officer from 1983 to 1985 in the West African countries of Sierra Leone and Liberia. After serving in NASA from 1987 to 1993, Jemison founded The Jemison Group, Inc., which developed ALAFIYA, a satellite-based telecommunications systems. This system was to be used to improve health care delivery in developing nations. She also was a professor in the Environmental Studies Program at Dartmouth College, where she directed the Jemison Institute for Advancing Technology in Developing Countries. She has studied astronomy, zoology, archaeology, and many other studies.