If you haven’t already heard, abolitionist hero Harriet Tubman will be the new face of the $20 bill, replacing former President Andrew Jackson as the first woman in more than a century and the first African-American to be pictured on the front of a U.S. bank note. Tubman, who escaped slavery, is best known for risking her life to lead hundreds of other American slaves to freedom along the Underground Railroad in the 1850s.