With their best-selling astronomy textbook, HORIZONS, INTERNATIONAL EDITION, authors Mike Seeds and Dana Backman help you understand your place in the universe-not just your location in space, but your role in the unfolding history of the physical universe. To achieve this goal, they focuses on two central questions: What Are We?, which highlights your place as a planet dweller in an evolving universe, guiding you to better understand where we came from and how we formed, and How Do We Know?, which provides insights into how the process of science can teach us more about what we are.