Meet Marcelo, a kid like you and me, who grew up in Brazil wanting to become a philosopher and solve logic puzzles. Philosophy led him to physics, and physics led him to mathematics. Learn how Marcelo thinks about mathematical equations as puzzles to solve and how solving one of those puzzles helped him learn about how the universe works.The Who Me? series features inspirational biographies of scientists whom young readers will be able to identify with as people like themselves. Written by the scientists themselves and co-authors from Vanderbilt University, the books are designed to help young readers understand that scientists are regular people like themselves who are excited about learning and discovering new things, and who decided to work hard in school in order to create for themselves the opportunity to become scientists. As they learn the stories of these scientists, readers will also learn some basic scientific ideas that are well-explained and easily understood and be introduced to cutting-edge science these scientists are working on today.Who Me? series co-editors: David A Weintraub, Professor of Astronomy, of History, and of Communication of Science and Technology, College of Arts & Science, Vanderbilt University; Ann Neely, Associate Professor Emerita of the Practice of Education, Peabody College of Education and Human Development, Vanderbilt University; and Kevin Johnson, Professor of Biomedical Informatics and of Pediatrics, Vanderbilt University and Vanderbilt University Medical Center.In this series: