Where did Earth get its water? In this captivating episode, host John Murphy explores the mysteries of Earth’s formation and evolution with Dr. Mark Harrison, a distinguished professor of geochemistry from UCLA.

They dive into fascinating topics such as the origin of Earth’s water, tectonic plate movement, and what ancient zircons reveal about early Earth. Dr. Harrison challenges the traditional view of a “hellish” early Earth, offering a nuanced understanding of its transition to a water-rich planet and discussing the potential existence of vast, hidden oceans deep beneath the surface.

This thought-provoking conversation will ignite your curiosity about our planet’s ancient past and the dynamic processes that continue to shape it today.