The deepest point on Earth, the **Challenger Deep in the Mariana Trench**, lies approximately 11 kilometers below the surface. So deep that even if you placed the entire Mount Everest there, seawater would still remain above the summit, what exactly can be found in this place?

In this Earth documentary, we descend into the **deep sea world at a depth of nearly 11,000 meters**. Passing through the deep ocean where sunlight completely disappears, we arrive at the deepest ocean floor, where we encounter water pressure reaching approximately 1,100 times greater, cold water, fine mud, and life forms adapted to this extreme environment.

However, the Mariana Trench is special not simply because of its depth. Here, the ancient and cold *Pacific Plate is subducting beneath other plates and sinking into the Earth's interior.* This process of the ocean floor bending downward has continued for tens of millions of years, creating this massive trench.

Why is the Mariana Trench deeper than other trenches?

How does life survive 11 kilometers below the surface? And how far down does the ocean floor extend into the Earth?

From the Challenger's first depth measurements in 1875 to modern deep-sea submersibles and unmanned exploration, we follow the *true nature of the deepest point on Earth* that humanity has uncovered, one by one.

The ocean we see is not the end.

Beneath it lies a massive tunnel where the Earth's surface continues to return to the Earth's interior.

Explore the story of Earth, seen and heard like a movie, together at the **Earth Documentary Hall**.

00:00 The Ocean Deeper Than Everest
00:51 Discovery of the Challenger Deep

03:21 11km Below the Surface

03:40 The Deep Sea Where Light Disappears

05:40 The Ultra-Deep Sea Zone 6,000m Below

06:27 The Bottom of the Challenger Deep

08:05 The First Manned Deep Sea Expedition

09:20 The Deepest Point Rediscovered by Humans

10:02 Life 11km Below

11:08 Why Is This Place Only 11km Below?

11:42 The Identity of the Mariana Trench

12:39 The Connection Between Trenchs, Volcanoes, and Earthquakes

14:18 Why Is the Ocean Deep?

16:04 The Seafloor Sinks as It Ages

17:25 The 150 Million-Year-Old Seafloor

19:04 The Moving Pacific Plate

20:19 The Seafloor Disappearing in Trenchs

21:25 The Valley Created by the Bending Floor

21:42 Subduction Zones and Deep Earthquakes

23:07 Volcanoes Created by Water

24:27 The Mariana Mud Volcanoes

25:24 Why Is the Mariana the Deepest?

27:02 No Continent to Fill the Trench

28:23 Subduction Continued for 50 Million Years

30:00 Life Under Extreme Pressure

31:19 The Survival Limits of Fish

32:06 What Do Deep-Sea Creatures Eat?

33:15 Trenchs Gathering Food

35:17 Pollution Reaching the Deepest Depths

36:03 Plates Descending Beneath the Trench

37:28 The Moving Mariana Trench

38:34 The Slowly Disappearing Pacific Ocean

39:26 The Gateway into the Earth

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