Living Calculus presents calculus as modern and relevant, an invaluable tool for analyzing change and understanding our dynamic world. This book draws heavily on real data, introducing calculus through wide-ranging topics: a supernova, the water cycle and human growth, among others. It introduces derivatives and integrals, the major tools of calculus, in contexts where they provide useful and topical insights. From this engaging beginning, the book develops a fully rigorous treatment of calculus. To learn more about this project and download free resources, visit the living calculus blog at https://livingcalculus.com/