Travel from a newborn, molten Earth to the first modern humans in a narrated journey through deep time. This episode follows the planet’s biggest turning points—how the Moon helped steady Earth’s long-term rhythms, how early oceans and microbes left clues in stone, how photosynthesis filled the air with oxygen and changed life’s rules, how global ice ages and the first large animals set the stage for the Cambrian burst of diversity, how plants transformed the continents and helped create the coal we burn today, and how plate tectonics, a dinosaur-ending impact, and changing climates shaped the world we inherited. Along the way, it points out real places and features you can still see today that preserve echoes of each chapter.