Scientists are obsessed with this lake - Nicola Storelli and Daniele Zanzi

976,751 views ใƒป 2024-05-14

TED-Ed


์•„๋ž˜ ์˜๋ฌธ์ž๋ง‰์„ ๋”๋ธ”ํด๋ฆญํ•˜์‹œ๋ฉด ์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค.

๋ฒˆ์—ญ: Minnie Min Hee Lee ๊ฒ€ํ† : Jeong-han Kim
00:06
Roughly 3 billion years ago,
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์•ฝ 30์–ต ๋…„ ์ „,
00:08
a single-celled photosynthetic bacterium began burping a new chemical
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๋‹จ์„ธํฌ ๊ด‘ํ•ฉ์„ฑ์„ธ๊ท  ํ•˜๋‚˜๊ฐ€ ์ง€๊ตฌ์ƒ์˜ ๊ฑฐ์˜ ๋ชจ๋“  ์ข…์—๊ฒŒ
00:14
that was poisonous to nearly every species on Earth.
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์ƒˆ๋กœ์šด ์œ ๋… ํ™”ํ•™ ๋ฌผ์งˆ์„ ๋‚ด๋ฟœ๊ธฐ ์‹œ์ž‘ํ–ˆ์Šต๋‹ˆ๋‹ค.
00:19
Over the following hundreds of millions of years,
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๊ทธ ํ›„ ์ˆ˜์–ต ๋…„ ๋™์•ˆ
00:22
more microorganisms began producing this toxic gas,
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๋” ๋งŽ์€ ๋ฏธ์ƒ๋ฌผ์ด ์œ ๋… ๊ฐ€์Šค๋ฅผ ์ƒ์„ฑํ•˜๊ธฐ ์‹œ์ž‘ํ–ˆ๊ณ ,
00:27
first saturating Earth's oceans and eventually its atmosphere.
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์ฒ˜์Œ์—๋Š” ์ง€๊ตฌ์˜ ๋ฐ”๋‹ค์™€ ๋Œ€๊ธฐ๊ฐ€ ์ด ๊ฐ€์Šค๋กœ ํฌํ™”์ƒํƒœ๊ฐ€ ๋ฉ๋‹ˆ๋‹ค.
00:32
Up here, this chemical changed the composition of pre-existing gases
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์ด ๊ฐ€์Šค๋Š” ์ง€๊ตฌ์˜ ๊ธฐ์กด ๊ธฐ์ฒด ๊ตฌ์กฐ๋ฅผ ์ •๋ง ํฌ๊ฒŒ ๋ณ€ํ™”์‹œ์ผœ
00:36
so drastically that it caused a global ice age.
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์˜จ ์ง€๊ตฌ์— ๋น™ํ•˜๊ธฐ๋ฅผ ์ผ์œผํ‚ต๋‹ˆ๋‹ค.
00:40
And the name of this powerful, poisonous, world-changing gas? Oxygen.
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๊ฐ•๋ ฅํ•˜๊ณ  ์œ ๋…ํ•˜๋ฉฐ ์„ธ์ƒ์„ ๋ฐ”๊พผ ์ด ๊ฐ€์Šค์˜ ์ด๋ฆ„์€ ๋ญ˜๊นŒ์š”? ์‚ฐ์†Œ์ž…๋‹ˆ๋‹ค.
00:47
In the millions of years since the Great Oxygen Catastrophe,
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์‚ฐ์†Œ ๋Œ€์žฌ์•™ ์ดํ›„ ์ˆ˜๋ฐฑ๋งŒ ๋…„ ๋™์•ˆ
00:51
most life, including all multicellular organisms,
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๋‹ค์„ธํฌ ์ƒ๋ฌผ์„ ํฌํ•จํ•œ ๋Œ€๋ถ€๋ถ„์˜ ์ƒ๋ช…์ฒด๋Š”
00:55
have evolved to rely on this gas.
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์‚ฐ์†Œ์— ์˜์กดํ•˜๋„๋ก ์ง„ํ™”ํ•ด ์™”์Šต๋‹ˆ๋‹ค.
00:57
However, there are some places where oxygen-averse microorganisms,
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ํ•˜์ง€๋งŒ ์ง€๊ตฌ ์ดˆ์ฐฝ๊ธฐ ์‹œ์ ˆ ๋ฏธ์ƒ๋ฌผ์ฒ˜๋Ÿผ
01:02
like those from Earth's earliest days, have re-emerged.
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์‚ฐ์†Œ๋ฅผ ์‹ซ์–ดํ•˜๋Š” ๋ฏธ์ƒ๋ฌผ์ด ๋‹ค์‹œ ์ƒ๊ฒจ๋‚œ ๊ณณ๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
01:07
Many of these places are in the ocean depths,
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์ด๋Ÿฐ ๊ณณ ์ค‘ ์ƒ๋‹น์ˆ˜๋Š”
01:10
beyond the reach of researchers.
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์—ฐ๊ตฌ์ž์˜ ์†์ด ๋‹ฟ์ง€ ์•Š๋Š” ์‹ฌํ•ด์— ์œ„์น˜ํ•ฉ๋‹ˆ๋‹ค.
01:12
But there are other bodies of water completely devoid of oxygen,
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ํ•˜์ง€๋งŒ ์‚ฐ์†Œ๊ฐ€ ์ „ํ˜€ ์—†๋Š”๋ฐ๋„
01:16
yet close enough to the surface to explore.
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ํƒํ—˜ํ•  ์ˆ˜ ์žˆ์„ ์ •๋„๋กœ ๊ฐ€๊นŒ์šด ๊ณณ๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
01:19
And one such lake is hidden high in the Swiss Alpsโ€™ Piora Valley.
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์Šค์œ„์Šค ์•Œํ”„์Šค ์‚ฐ๋งฅ ํ”ผ์˜ค๋ผ ๊ณ„๊ณก์— ๊ทธ๋Ÿฐ ํ˜ธ์ˆ˜ ํ•˜๋‚˜๊ฐ€ ์ˆจ๊ฒจ์ ธ ์žˆ์Šต๋‹ˆ๋‹ค.
01:24
Formed over 10,000 years ago,
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1๋งŒ ๋…„ ์ „์— ํ˜•์„ฑ๋œ ์นด๋‹ค๋‡จ ํ˜ธ์ˆ˜๋Š”
01:27
Lake Cadagno is one of roughly 200 known meromictic lakes,
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์ „ ์„ธ๊ณ„์— ๋ถ„ํฌํ•œ ์•ฝ 200์—ฌ ๊ฐœ ๋ถ€๋ถ„์ˆœํ™˜ํ˜ธ ๊ฐ€์šด๋ฐ ํ•˜๋‚˜์ž…๋‹ˆ๋‹ค.
01:32
meaning it's actually two distinct bodies of water stacked on top of each other.
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๋ถ€๋ถ„์ˆœํ™˜ํ˜ธ์—๋Š” ์„œ๋กœ ๋ถ„๋ฆฌ๋œ ์ˆ˜์—ญ ๋‘ ๊ฐœ๊ฐ€ ๊ฒน์ณ ์žˆ์Šต๋‹ˆ๋‹ค.
01:38
The top layer functions like a standard body of freshwater.
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ํ˜ธ์ˆ˜ ์ƒ์ธต์€ ํ‰๋ฒ”ํ•œ ๋‹ด์ˆ˜ ์ˆ˜์—ญ์ž…๋‹ˆ๋‹ค.
01:41
Itโ€™s safe for swimming and known mostly for a plump and plentiful fish population
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์ด๊ณณ์€ ์ˆ˜์˜ํ•ด๋„ ์•ˆ์ „ํ•˜๋ฉฐ, ์ˆ˜์„ธ๊ธฐ ๋™์•ˆ
01:47
thatโ€™s been the subject of local fishing legends for centuries.
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ํ˜„์ง€ ๋‚š์‹œ ์ผํ™”๋“ค์— ์†Œ์žฌ๋กœ ๋“ฑ์žฅํ•˜๋Š” ํ†ตํ†ตํ•˜๊ณ  ํ’๋ถ€ํ•œ ์–ด๋ฅ˜๋กœ ์œ ๋ช…ํ•ฉ๋‹ˆ๋‹ค.
01:51
But just 13 meters beneath that bounty is a dense, sulfurous, oxygen-free pool
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๊ทธ๋Ÿฌ๋‚˜ ํ•ด์ € 13๋ฏธํ„ฐ ์•„๋ž˜์—๋Š” ๋ฌผ๊ณ ๊ธฐ๋ฅผ ํฌํ•จํ•œ ๋ชจ๋“  ๋‹ค์„ธํฌ ์ƒ๋ฌผ์—๊ฒŒ ์น˜๋ช…์ ์ธ
01:58
lethal to any multicellular life forms, fish included.
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์œ ํ™ฉ ๊ฐ€๋“ํ•˜๊ณ  ์‚ฐ์†Œ๊ฐ€ ์—†๋Š” ์›…๋ฉ์ด๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
02:03
In a typical lake, the entire body of water would gradually mix,
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์ผ๋ฐ˜์ ์ธ ํ˜ธ์ˆ˜์—์„œ๋Š” ์ˆ˜์—ญ ์ „์ฒด๊ฐ€ ์„ž์ด๋ฉฐ
02:07
diffusing oxygen from the surface throughout.
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ํ‘œ๋ฉด์— ๋…น์•„์žˆ๋Š” ์‚ฐ์†Œ๊ฐ€ ํ˜ธ์ˆ˜ ์ „์ฒด๋กœ ํ™•์‚ฐ๋ฉ๋‹ˆ๋‹ค.
02:11
But these two layers never mix, as is the case with any meromictic lake.
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ํ•˜์ง€๋งŒ ๋ถ€๋ถ„์ˆœํ™˜ํ˜ธ์—์„œ ๋‘ ์ธต์€ ์ ˆ๋Œ€ ์„ž์ด์ง€ ์•Š์Šต๋‹ˆ๋‹ค.
02:16
And the reason for this divide in Cadagno
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์นด๋‹ค๋‡จ ํ˜ธ๊ฐ€ ์ด๋ ‡๊ฒŒ ๋‘ ์ธต์œผ๋กœ ๋‚˜๋‰œ ์ด์œ ๋Š”
02:19
is the watersโ€™ unique chemical compositions.
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๋ฌผ์˜ ๋…ํŠนํ•œ ํ™”ํ•™ ์„ฑ๋ถ„ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค.
02:22
Both layers are fed by rainwater flowing down the mountains,
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๋‘ ์ธต ๋ชจ๋‘ ์‚ฐ ์•„๋ž˜๋กœ ํ๋ฅด๋Š” ๋น—๋ฌผ์ด ์ˆ˜์›์ด์ง€๋งŒ
02:27
however, this water can take two paths.
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์ด ๋ฌผ์€ ๋‘ ๊ฐ€์ง€ ๊ฒฝ๋กœ๋กœ ์ด๋™ํ•ฉ๋‹ˆ๋‹ค.
02:30
The first is to trickle down the granitic mountain directly into the top layer.
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์ฒซ ๋ฒˆ์งธ ๊ธธ์€ ํ™”๊ฐ•์•”์„ ํƒ€๊ณ  ๋‚ด๋ ค์™€ ์ตœ์ƒ์ธต์œผ๋กœ ๋ฐ”๋กœ ํ˜๋Ÿฌ ๋“ค์–ด๊ฐ€๋Š” ๊ฒ๋‹ˆ๋‹ค.
02:35
The second is to seep into the Piora Valleyโ€™s vein of dolomiteโ€”
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๋‘ ๋ฒˆ์งธ๋Š” ํ™ฉ์‚ฐ์—ผ๊ฐ™์ด ์—ผ๋ถ„์ด ๊ฐ€๋“ํ•œ ๋‹ค๊ณต์„ฑ ์•”์„
02:41
a porous rock full of salts such as sulfate.
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์ฆ‰ ํ”ผ์˜ค๋ผ ๊ฐ•๊ณจ์งœ๊ธฐ์— ์œ„์น˜ํ•œ ๋ฐฑ์šด์•” ์ˆ˜๋งฅ์œผ๋กœ ์Šค๋ฉฐ๋“œ๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:45
Rainwater that sinks into the dolomite will slowly inch towards the lake,
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๋ฐฑ์šด์•” ์ˆ˜๋งฅ์œผ๋กœ ํ๋ฅด๋Š” ๋น—๋ฌผ์€ ์ฒœ์ฒœํžˆ ํ˜ธ์ˆ˜ ์ชฝ์œผ๋กœ ํ˜๋Ÿฌ์˜ค๋ฉฐ
02:50
all the while shedding its oxygen and picking up salts.
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์‚ฐ์†Œ๋ฅผ ๋ฐฐ์ถœํ•˜๊ณ  ์—ผ๋ถ„์„ ํก์ˆ˜ํ•ฉ๋‹ˆ๋‹ค.
02:54
Finally, this heavier water will cascade from sublacustrine springs
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๊ฒฐ๊ตญ ๋ฌด๊ฑฐ์›Œ์ง„ ๋ฌผ์€ ํ˜ธ์ˆ˜ ํ‘œ๋ฉด ์•„๋ž˜ ์ƒ˜์—์„œ
03:00
below the lakeโ€™s surface,
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์Ÿ์•„์ ธ ๋‚˜์™€
03:01
forming the dense, salt-rich bottom layer.
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๋ฐ€๋„๊ฐ€ ๋†’๊ณ  ์—ผ๋ถ„์ด ํ’๋ถ€ํ•œ ํ˜ธ์ˆ˜ ๋ฐ”๋‹ฅ์ธต์„ ํ˜•์„ฑํ•ฉ๋‹ˆ๋‹ค.
03:05
This lower layer is anoxic, meaning oxygen free,
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ํ˜ธ์ˆ˜ ๋ฐ”๋‹ฅ์ธต์€ ์‚ฐ์†Œ๊ฐ€ ์—†๋Š” ๋ฌด์‚ฐ์†Œ ์ƒํƒœ์ด๋ฉฐ
03:09
and will suffocate any oxygen-dependent life.
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์‚ฐ์†Œ์— ์˜์กดํ•˜๋Š” ๋ชจ๋“  ์ƒ๋ช…์ฒด๋Š” ์ด๊ณณ์—์„œ ์งˆ์‹ํ•ฉ๋‹ˆ๋‹ค.
03:12
But itโ€™s ideal for the kind of anaerobic bacteria that died off
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ํ•˜์ง€๋งŒ ์‚ฐ์†Œ ๋Œ€์žฌ์•™์œผ๋กœ ๋ฉธ์ข…ํ•œ
03:16
in the Great Oxygen Catastrophe.
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ํ˜๊ธฐ์„ฑ์„ธ๊ท ์—๊ฒ ์ด์ƒ์ ์ธ ๊ณณ์ด์ฃ .
03:19
The flow from the sublacustrine springs creates microenvironments
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ํ˜ธ์ˆ˜ ํ‘œ๋ฉด ์•„๋ž˜ ์ƒ˜์˜ ํ๋ฆ„์€ ํ˜ธ์ˆ˜ ๋ฐ”๋‹ฅ์—์„œ
03:23
which feed large aggregates of microorganisms
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๊ธฐ์ดํ•˜๊ณ  ์ดˆ์ž์—ฐ์ ์œผ๋กœ ์ƒ๊ธด ์ปค๋‹ค๋ž€ ๋ฏธ์ƒ๋ฌผ ์ง‘ํ•ฉ์ฒด๋ฅผ
03:27
that emerge from the lakebed in strange and otherworldly shapes.
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๋จน์ด๋กœ ๋จน๋Š” ๋ฏธ์„ธํ™˜๊ฒฝ์„ ๋งŒ๋“ค์–ด๋ƒ…๋‹ˆ๋‹ค.
03:31
Various anaerobic microorganisms take in the water's sulfate
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๋‹ค์–‘ํ•œ ํ˜๊ธฐ์„ฑ์„ธ๊ท ์ด ๋ฌผ ์† ํ™ฉ์‚ฐ์—ผ์„ ํก์ˆ˜ํ•˜๊ณ 
03:36
and emit toxic sulfide.
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๋…์„ฑ ํ™ฉํ™”๋ฌผ์„ ๋ฐฐ์ถœํ•ฉ๋‹ˆ๋‹ค.
03:39
And at the border of these layers,
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๊ทธ๋ฆฌ๊ณ  ๋‘ ํ˜ธ์ˆ˜์ธต์˜ ๊ฒฝ๊ณ„์—๋Š”
03:41
thereโ€™s a thin blanket mainly composed of pink-bodied Chromatium okenii:
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์ฃผ๋กœ ๋ชธ์ฒด๊ฐ€ ๋ถ„ํ™์ƒ‰์ธ Chromatium okenii๋กœ ์ด๋ฃจ์–ด์ง„ ์–‡์€ ์ธต์ด ์žˆ์Šต๋‹ˆ๋‹ค.
03:46
a photosynthesizing bacterium that relies on this sulfur
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๋Œ€๋ถ€๋ถ„ ์‹๋ฌผ์ด ์‚ฐ์†Œ์— ์˜์กดํ•˜๋Š” ๊ฒƒ์ฒ˜๋Ÿผ
03:51
the way most plants rely on oxygen.
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Chromatium okenii๋Š” ํ™ฉ์— ์˜์กดํ•˜๋Š” ๊ด‘ํ•ฉ์„ฑ์„ธ๊ท ์ž…๋‹ˆ๋‹ค.
03:54
However, while neither water nor organisms move between the layers,
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๊ทธ๋Ÿฐ๋ฐ ๋ฌผ์ด๋‚˜ ์œ ๊ธฐ์ฒด๊ฐ€ ๋‘ ํ˜ธ์ˆ˜์ธต ์‚ฌ์ด๋ฅผ ์ด๋™ํ•˜์ง€๋Š” ์•Š์ง€๋งŒ,
03:59
these ecosystems arenโ€™t completely out of touch.
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๋‘ ์ƒํƒœ๊ณ„๊ฐ€ ์™„์ „ํžˆ ๋ถ„๋ฆฌ๋˜์–ด ์žˆ์ง€๋Š” ์•Š์Šต๋‹ˆ๋‹ค.
04:02
Chromatium okenii live at the top of the bottom layer
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Chromatium okenii๋Š” ์ตœ๋Œ€ํ•œ ํƒœ์–‘์— ๊ฐ€๊นŒ์ด ์žˆ์–ด์•ผ ํ•˜๊ธฐ ๋•Œ๋ฌธ์—
04:06
because they need to be as close to the sun as possible.
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ํ˜ธ์ˆ˜ ๋ฐ”๋‹ฅ์ธต์˜ ์œ—๋ถ€๋ถ„์— ์„œ์‹ํ•ฉ๋‹ˆ๋‹ค.
04:10
But while they never cross into the deadly oxygenated waters,
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Chromatium okenii๋Š” ์น˜๋ช…์ ์ธ ์‚ฐ์†Œ๊ฐ€ ์žˆ๋Š” ํ˜ธ์ˆ˜ ์ƒ์ธต์œผ๋กœ ์ ˆ๋Œ€ ๊ฑด๋„ˆ๊ฐ€์ง€ ์•Š์ง€๋งŒ
04:14
theyโ€™re close enough that organisms like zooplankton can dive down,
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๋™๋ฌผ์„ฑ ํ”Œ๋ž‘ํฌํ†ค๊ฐ™์€ ์œ ๊ธฐ์ฒด๊ฐ€ ๋ฐ”๋‹ฅ์ธต์œผ๋กœ ๋›ฐ์–ด๋“ค์–ด
04:19
eat them, and get back up.
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Chromatium okenii๋ฅผ ์‚ฌ๋ƒฅํ•˜๊ณ  ๋‹ค์‹œ ์˜ฌ๋ผ์˜ฌ ์ˆ˜ ์žˆ์„ ๋งŒํผ ๊ฐ€๊นŒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
04:22
In fact, this relationship forms the bottom of the upper layerโ€™s
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์‹ค์ œ๋กœ ์ด ๊ด€๊ณ„๋Š” ํ˜ธ์ˆ˜์˜ ์–ด๋งˆ์–ด๋งˆํ•œ ๋ฌผ๊ณ ๊ธฐ ๊ฐœ์ฒด์ˆ˜๋ฅผ ์ง€ํƒฑํ•˜๋Š”
04:26
robust food chain
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ํ˜ธ์ˆ˜ ์ƒ์ธต ํƒ„ํƒ„ํ•œ
04:27
supporting the lakeโ€™s legendary fish population.
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๋จน์ด์‚ฌ์Šฌ์˜ ๋ฐ‘๋ฐ”ํƒ•์„ ์ด๋ฃน๋‹ˆ๋‹ค.
04:31
This unique ecology is more than just a boon for Cadagnoโ€™s fishermen.
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์ด๋Ÿฐ ๋…ํŠนํ•œ ์ƒํƒœ๊ณ„๋Š” ์นด๋‹ค๋‡จ ํ˜ธ ์–ด๋ถ€๋“ค์—๊ฒŒ ๋‹จ์ˆœ ํ˜œํƒ ๊ทธ ์ด์ƒ์ž…๋‹ˆ๋‹ค.
04:35
Having access to an isolated anaerobic ecosystem
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๊ณ ๋ฆฝ๋œ ํ˜๊ธฐ์„ฑ ์ƒํƒœ๊ณ„๋ฅผ ๋ถ„์„ํ•˜๋ฉด
04:39
allows scientists to model the world before the Great Oxygen Catastrophe.
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๊ณผํ•™์ž๋“ค์€ ์‚ฐ์†Œ ๋Œ€์žฌ์•™ ์ด์ „ ์„ธ๊ณ„๋ฅผ ์žฌํ˜„ํ•ด๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
04:45
For example, when Chromatium okenii form their blanket,
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์˜ˆ๋ฅผ ๋“ค์–ด Chromatium okenii๊ฐ€ ์ธต์„ ํ˜•์„ฑํ•  ๋•Œ
04:48
they increase the density of that thin layer of water.
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์–‡์€ ๋ฌผ ์ธต์˜ ๋ฐ€๋„๋Š” ์˜ฌ๋ผ๊ฐ‘๋‹ˆ๋‹ค.
04:52
As the water sinks, these microorganisms are forced to swim back up,
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๋ฌด๊ฑฐ์›Œ์ง„ ๋ฌผ ์ธต์ด ๊ฐ€๋ผ์•‰์œผ๋ฉด Chromatium okenii๋“ค์€ ํ—ค์—„์ณ ์˜ฌ๋ผ์™€์•ผ ํ•˜๋Š”๋ฐ,
04:57
creating a minute mixing of water called bioconvection.
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์ด๋•Œ ์ƒ์ฒด๋Œ€๋ฅ˜๋ผ๊ณ  ๋ถˆ๋ฆฌ๋Š” ๋ฏธ์„ธํ•œ ๋ฌผ์˜ ํ˜ผํ•ฉ์„ ์ผ์œผํ‚ต๋‹ˆ๋‹ค.
05:01
This billions of years old phenomenon might be a clue
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์ˆ˜์‹ญ์–ต ๋…„์˜ ์—ญ์‚ฌ๋™์•ˆ ๊ณ„์†๋ผ์˜จ ์ด ํ˜„์ƒ์€ ์ดˆ๊ธฐ ์ƒ๋ช…์ฒด๊ฐ€
05:05
to how early life evolved the ability to swim.
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์–ด๋–ป๊ฒŒ ์ˆ˜์˜ ๋Šฅ๋ ฅ์„ ์–ป๋„๋ก ์ง„ํ™”ํ–ˆ๋Š”์ง€ ์•Œ์•„๋‚ด๋Š” ๋‹จ์„œ๊ฐ€ ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
05:09
And itโ€™s just one of the many insights that await researchers
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์ด๋Š” ์นด๋‹ค๋‡จ ํ˜ธ์˜ ์‹ ๋น„ํ•œ ์ˆ˜์—ญ์„ ์—ฐ๊ตฌํ•˜๋Š”
05:13
studying Cadagnoโ€™s mysterious depths.
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๊ณผํ•™์ž๋“ค์ด ์•ž์œผ๋กœ ๋ฐœ๊ฒฌํ•ด๋‚ผ ์ˆ˜๋งŽ์€ ํ˜œ์•ˆ ์ค‘ ํ•˜๋‚˜์ผ ๋ฟ์ž…๋‹ˆ๋‹ค.
์ด ์›น์‚ฌ์ดํŠธ ์ •๋ณด

์ด ์‚ฌ์ดํŠธ๋Š” ์˜์–ด ํ•™์Šต์— ์œ ์šฉํ•œ YouTube ๋™์˜์ƒ์„ ์†Œ๊ฐœํ•ฉ๋‹ˆ๋‹ค. ์ „ ์„ธ๊ณ„ ์ตœ๊ณ ์˜ ์„ ์ƒ๋‹˜๋“ค์ด ๊ฐ€๋ฅด์น˜๋Š” ์˜์–ด ์ˆ˜์—…์„ ๋ณด๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ฐ ๋™์˜์ƒ ํŽ˜์ด์ง€์— ํ‘œ์‹œ๋˜๋Š” ์˜์–ด ์ž๋ง‰์„ ๋”๋ธ” ํด๋ฆญํ•˜๋ฉด ๊ทธ๊ณณ์—์„œ ๋™์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋น„๋””์˜ค ์žฌ์ƒ์— ๋งž์ถฐ ์ž๋ง‰์ด ์Šคํฌ๋กค๋ฉ๋‹ˆ๋‹ค. ์˜๊ฒฌ์ด๋‚˜ ์š”์ฒญ์ด ์žˆ๋Š” ๊ฒฝ์šฐ ์ด ๋ฌธ์˜ ์–‘์‹์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌธ์˜ํ•˜์‹ญ์‹œ์˜ค.

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