This "evocative and beautiful" (School Library Journal) novel "vividly imagines the lives of three girls" (Booklist, starred review) in three different time periods as they grow up to become groundbreaking scientists.Maria Merian was sure that caterpillars were not wicked things born from mud, as most people of her time believed. Through careful observation she discovered the truth about metamorphosis and documented her findings in gorgeous paintings of the life cycles of insects. More than a century later, Mary Anning helped her father collect stone sea creatures from the cliffs in southwest England. To him they were merely a source of income, but to Mary they held a stronger fascination. Intrepid and patient, she eventually discovered fossils that would change people’s vision of the past. Across the ocean, Maria Mitchell helped her mapmaker father in the whaling village of Nantucket. At night they explored the starry sky through his telescope. Maria longed to discover a new comet—and after years of studying the night sky, she finally did. Told in vibrant, evocative poems, this stunning novel celebrates the joy of discovery and finding wonder in the world around us.