This episode explores how Earth's oceans formed from water released by the planet's interior and delivered by ancient asteroids and comets. As the young Earth cooled, water condensed and accumulated, creating the first oceans. These early seas became the environment in which life likely originated and evolved for billions of years. The episode examines how oceans regulate climate, drive weather systems, support biodiversity, and influence the chemistry of the atmosphere. It also highlights the role of oceans in exploration, trade, and the development of human civilization. Despite their importance, much of the deep ocean remains unexplored. Ultimately, the episode presents oceans as the cradle of life and one of the most important systems sustaining the planet today.

Ask this episode

“What did the council decide on item 42?” — answered with the speaker and the moment.