What If: Science, Theory, and Possibilities episodes
Mariana Trench: How Deep Is Earth’s Deepest Ocean Trench?

Mariana Trench: How Deep Is Earth’s Deepest Ocean Trench?

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How deep does the ocean go? Explore the Mariana Trench, home to Earth’s deepest known point, and discover how its depths compare with Mount Everest.

If Mount Everest were placed in the Mariana Trench, more than 2 km of water would still cover its peak. In a hypothetical ocean without water, a fall to the trench’s bottom would take roughly 3.5 minutes.

The ocean covers about 71% of Earth’s surface, yet much of its seabed remains unexplored. Discover the extreme pressure, strange life, and vast depths beneath the waves.

Explore more What If scenarios and go deeper with the What If community.

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