Name: サメが知らず知らずのうちにやっている8つのこと (8 Things Sharks Do for You Without You Knowing)
Uploaded: 2021-01-14T08:52:29.000Z
Duration: 10 min 1 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

上級受動態

In reality, you have more chances of being struck by lightning than being bitten by a

Still, sharks do have a bad rap, even though they’re not horrible as people think.

They’ve even been known to save people!

Here’s my list of why I think sharks are cool!

Because of excessive hunting, there are fewer sharks around the world.

People hunt them to get ingredients for things like shark fin soup or shark cartilage pills,

without realizing that not enough sharks means not enough oxygen for us all to breathe.

Sharks feed on smaller fish, and smaller fish feed on phytoplankton – tiny organisms that

Phytoplankton consumes carbon dioxide, releasing oxygen.

Without sharks, there’ll be too many fish eating the plankton.

It all boils down to one thing –a lack of oxygen.

Scientists are continuously studying these fascinating creatures, leading to medical

They’re especially interested in shark DNA, and the possibility that it holds a cure for

tumors, since their genes, in some way, protect sharks against them.

What’s more, researchers found a special compound called squalamine in dogfish sharks'

tissue that can fight various chronic infections in humans.

Likewise, sharks’ skin has unique antibacterial properties, which inspired scientists to invent

a special surface-coating called Sharklet.

Sharklet mimics the diamond pattern of shark skin and is used in hospitals to reduce the

Great white sharks can move at a speed of up to 25 mph.

The secret is in their denticles – small, flat, V-shaped scales.

These scales significantly lessen drag force and turbulence.

Olympian swimsuit designers did their best to duplicate the sharks’ denticles, creating

a fabric that makes swimmers sleeker and faster in the water.

The shark’s fin also became a huge inspiration for inventing new technology for clean energy.

One Australian company made a device that captures tidal energy from the ocean, and

converts it into electric power with minimal environmental impact.

A 2018 Harvard University study suggests that these unique denticles on sharks’ skin can

also help to create more efficient planes and cars.

The team of engineers found out that they increase lift.

Lift is the force that pulls a plane up when the pressure of the air on the top of the

wing is less than the pressure of the air under the bottom of the wing.

So, by incorporating 3D-printed images of the denticles on the wings, engineers hope

They can also be used for vortex generators – a small vane attached to the top of the

rear windshield of a car, which increases the downforce of a vehicle.

As you already know, the shark population is declining.

This means that there are much more turtles, crabs, and stingrays.

But seagrass is a vital part of the blue carbon ecosystem, which captures and stores carbon

40 times more efficiently than tropical rainforests.

That’s why, without sharks, the marine creatures keep eating the seagrass, disrupting the blue

carbon ecosystems, and releasing ancient carbon.

This has the same effect as the greenhouse gas emissions from cars that destroy the ozone

layer, leading to unpredictable and harmful climate change.

People are scared of sharks, but they’re also fascinated by these majestic predators.

And over the last two decades, this fascination has turned into a thriving ecotourism industry.

The desire to get close to sharks pays off really well – it brings millions of dollars

to the economies of the Bahamas, South Africa, the Galápagos Islands, Australia, and many

Shark diving tourism is especially popular, and it boosts local businesses, like diving

Back in 2010, a 41-year-old man from Kiribati, an island country in the central Pacific Ocean,

got carried away into open waters on a wooden boat.

He was stranded out there with almost no water or fuel for 105 days.

No one knows how long his ordeal would’ve lasted had it not been for one shark.

Just when he’d lost all hope, a miracle happened.

He woke up to the sounds of a huge shark bumping his boat - the animal was circling it into

The people on the ship saw the lonely man in the boat and helped him reunite with his

The man was deeply thankful, not only to those people, but to the smart shark too.

A diving instructor from Port Macquarie, Australia, has been buddies with a female Port Jackson

The man met his friend when the shark was just a pup.

At first, he approached the shark carefully not wanting to scare her off.

Pretty soon she got used to him and let him pat, and even cradle her.

After that, the two became regular friends.

The shark always recognizes the man and demands hugs at each visit.

He doesn’t want his story to encourage others to take risks around these marine creatures,

but he hopes people will stop seeing them as only aggressive attackers.

If you’re still not convinced that sharks are pretty cool, then get ready to hear some

amazing shark facts that’ll blow your mind!

You can also see them in some freshwater lakes and rivers.

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サメが知らず知らずのうちにやっている8つのこと (8 Things Sharks Do for You Without You Knowing)

chronic

thrive

force

consume