The ocean covers most of our planet… but we’ve barely explored what lies beneath. 
In this episode, we take a journey from the surface all the way down to the deepest known point on Earth — the Mariana Trench. As we descend layer by layer, sunlight fades, pressure rises, and the environment becomes more extreme than almost anywhere else on the planet.
What lives in total darkness? How deep can humans actually go? And what secrets are still hidden miles below the surface?
From the twilight zone to the crushing depths of the abyss, we explore the science, the creatures, and the mysteries of the deep ocean.
Because the deeper you go… the less we know.

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