Name: 宇宙から地球に落ちてきたら？ (What If You Fell From Space to Earth?)
Uploaded: 2021-01-14T08:05:54.000Z
Duration: 3 min 59 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：

After hearing how Alan Eustace jumped out of a balloon 42 km up and survived,

程度の副詞

I started to wonder about what would happen if he had been even higher.

How would his body have handled the extreme conditions of the atmosphere?

Let's go way up to the Karman line, where space technically begins, 100 km above Earth's surface.

We're going to jump out of this rocket and find out what happens.

As you can see, we are immediately knocked unconscious.

Brain cells need a constant flow of oxygen, which there's not very much of up here.

So when they don't get that, the brain goes into a state of hypoxia and kinda just shuts down.

In serious cases, this can lead to seizures, coma, and even brain death.

Also, up here in the thermosphere, we're being exposed to some very intense X-Rays and UV rays from the sun.

If this alone doesn't kill us, we'll likely start vomiting due to radiation poisoning.

When we get to the mesosphere, which reaches from 85 km above Earth down to 50 km, things don't get much better.

We're met with extremely cold temperatures here, almost negative 100 degrees celsius, giving us some serious frostbite!

But on top of that, the friction of falling this fast from this high up is literally burning through our skin!

This is also the layer of the atmosphere where meteors disintegrate.

They leave trails of dust and light behind them, which is what makes them look like shooting stars.

If you were to fall through the atmosphere, it would kind of be like you're a human version of a shooting star,

which doesn't sound fun when you actually think about what's happening.

Next, we'll enter the stratosphere, which is between 50km to about 15 km above the Earth's surface.

There's a point in the stratosphere above which, your blood starts to boil, around 23 km up.

At this level of atmospheric pressure, liquids boil at much lower temperatures

because the change in pressure of the liquid allows molecules to move more freely between liquid and gas states.

The lower the pressure, the quicker it boils.

So with low pressure levels at this height and above, your blood boils.

It could also happen with other bodily fluids like stomach acid and urine too!

The troposphere would likely be the least excruciatingly painful of the atmospheric levels.

In this layer that stretches about 15 km above the Earth's surface, the atmosphere becomes a lot more rich in oxygen and we can finally regain consciousness.

No one has ever fallen from 100 km up, but people have survived some pretty impressive falls.

Like WWII pilot Alan Magee who survived a fall of 6 km after crashing through a glass roof which absorbed some of the impact.

Or Vesna Vulovic whose plane exploded 10 km up.

She fell to the ground inside a piece of the plane and survived!

And it goes without saying, but obviously do not attempt this yourself.

So, have you ever been skydiving? Would you want to go skydiving?

Let me know in the comment section below, or tell us, what should we talk about next?

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宇宙から地球に落ちてきたら？ (What If You Fell From Space to Earth?)

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