About the Book: The Greatest Stuff on Earth is a fun and fascinating nonfiction STEM book that explores the science behind everyday things—like air, food, electricity, smartphones, and even our own bodies. With lively text, engaging illustrations, and fast facts, it explains how matter and energy work in everything from stars to engines to living creatures. Perfect for curious, knowledge-hungry kids, this educational science book offers endless entry points into how the world around us really works.