The Women in Science 2019 Wall Calendar is based on Rachel Ignotofsky's New York Times best-selling book, Women in Science: 50 Fearless Pioneers Who Changed the World. Each full-color monthly spread showcases one of the women from Rachel's book, including Wang Zhenyi, the astronomer who, in the 1700s, figured out how an eclipse occurs, and Rosalind Franklin, who discovered the DNA double helix. Let's celebrate these trailblazers so we can inspire the next generation.