Though the history books may point out significant men throughout time, that doesn't mean women didn't make notable contributions to society. While we know about Susan B. Anthony, Amelia Earhart and Florence Nightingale, there are tons of ladies who left their mark on the world but may have slipped under the cracks.

From a pioneer in pediatric cardiology to the lady who told Sen. Joe McCarthy "to go to hell," let's celebrate Women's History Month with a group of females who define what girl power really is.