Mae Jemison sealed her place in history in September 1992 when she became the first black woman to travel into space. She left NASA the following year, but in the 30 years since then, she has retained a high public profile thanks to a diverse career that has seen her found a consultancy company, work as a professor of environmental studies, write books, and become one of the principal figures behind the 100 Year Starship project (which looked int...