We still have a long way to go before achieving gender equity in the fields known as STEM: science, technology, engineering and mathematics. Those who have bucked the trend are inspiring, and in honor of Women's History Month, here are contemporary innovators in STEM and their historical analogs. The work of solar astronomer Mitzi Adams, left, has improved our understanding of the sun's turbulent behavior. Since joining NASA in 1988 at the Marshall Space Flight Center in Huntsville, Alabama, she has conducted research for a variety of solar missions. She carries on the tradition of discovery that Annie Jump Cannon (1863-1941) began in the late 1800s. Cannon was known as the "census taker in the sky," and developed a stellar classification system that became the standard of the Harvard Observatory.