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B1 中级 英语 11:20 Educational

What’s Hiding at the Most Solitary Place on Earth? The Deep Sea

Kurzgesagt · 25,241,145 次观看 · 添加于 3 周前

学习统计

B1

CEFR 等级

5/10

难度

字幕 (123 片段)

00:01

Sometimes the world feels...hmm, boring.

00:05

We've visited all the remote islands, conquered the Arctic, and penetrated the deepest jungles.

00:12

But there is still one place to explore.

00:15

It's a wet and deadly desert inhabited by mysterious creatures living in total darkness.

00:23

The deep sea.

00:25

Let's dive down.

00:26

[♫ Catchy Intro Jingle ♫]

00:37

When we look at the sheer scale of the Earth's oceans,

00:39

it's hard to believe that less than 2% of all biomass on Earth lives here.

00:45

And of that small percentage, around 90% is located close to the surface in the first 200 meters.

00:53

This is where we begin our journey.

00:56

Here, light can still penetrate the water which allows photosynthesis to occur.

01:01

Phytoplankton,

01:03

trillions and trillions of single-celled algae and bacteria make up the foundation

01:07

of the ocean's ecosystem, and they're consumed by bigger plankton, who are consumed by other species.

01:15

The seafloor at this depth is akin to the Amazon rainforest, and is often covered with coral reefs, algae,

01:21

and other sea plants that are home to a plethora of sea animals.

01:26

So far, we've focused most of our attention on this comparatively pleasant environment,

01:30

where we fish, swim, pollute, and do science.

01:35

So, let's dive deeper.

01:38

Moving from familiar coastal waters into deeper, more remote waters, we eventually reach the edge

01:43

of the continental shelf, where we're confronted with the continental slope,

01:47

the long descent down to the deep sea.

01:51

With every additional metre of water, light fades drastically, which means there are basically

01:56

no more plants, and the seemingly steep continental slope begins to remind us of the surface of the Moon.

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