The story of how three young girls: Maria Merian, Mary Anning, and Maria Mitchell changed science. The stories are told separately, occur at different time periods, and are written in verse. Maria Merian observed and painted pictures of the life cycle of insects. Mary Anning looked for fossils. Maria Mitchell mapped the night sky. All three were doing things that were deemed unladylike, but they persevered and influenced science. There is an author’s note at the end discussing how and why she wrote this book. Although this is a work of fiction, she also includes a bibliography about each girl and notes the books that were written for young readers.