What if the most important creature in the history of life on Earth… was a bacterium? Over a billion years ago, a playful little cell named Delta bounced into its friends in the gooey swamp of early Earth—and accidentally changed the course of evolution forever. Based on real science, with dazzling illustrations and easy-to-understand language, this book introduces young readers to the groundbreaking idea of endosymbiosis—the moment one cell started living inside another, giving rise to the complex life that would one day become dinosaurs, birds, and even us.
Learn more about endosymbiosis on Wikipedia.