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  • Cut!

  • Alright everyone, that's a wrap!

  • Movies love quicksand.

  • And why not?

  • It's exotic,

  • it's dramatic,

  • and it's highly exaggerated.

  • Fun fact: it's impossible to become fully submerged in quicksand.

  • But what could happen to you?

  • The reason why you don't normally sink into the sand

  • when you go to the beach

  • is due to a physics phenomenon

  • known as force chain.

  • Basically, when a bajillion grains of sand

  • are jammed together in one place,

  • their weight gets distributed over a large area,

  • keeping you and your camels safely above ground.

  • But if any water happens to

  • seep up from underground,

  • it will mix with the sand to create a surface that looks solid, but isn't...

  • It's true that real quicksand isn't like what you see at the movies.

  • The reason why you won't sink right through is because

  • quicksand is rarely more than a few feet deep.

  • And even if it was deeper than that, humans are only half as dense as quicksand,

  • so really, you couldn't sink much lower than your waist.

  • That is, unless you struggle.

  • Quicksand is a non-Newtonian fluid, meaning its viscosity changes under stress.

  • In high stress conditions, like being under the weight of your body, quicksand changes.

  • It becomes liquid, causing you to sink.

  • So if you panic, and start frantically trying to get out,

  • the rapid shifting of your weight will only suck you down deeper and faster.

  • On the other hand, quicksand gets thicker over time.

  • So if you just hang around and do nothing, it'll be harder for you to get out.

  • Every minute you're stuck in quicksand increases the risk that you'll suffer from

  • dehydration, starvation,

  • sun stroke, or hypothermia.

  • And if that doeesn't give you chills, those hungry looking eyes might.

  • Depending on where you are, you might even drown!

  • Quicksand is often found near the sea

  • because it's easier for water to rise up through the sand.

  • So if you're ever caught in the coast, be sure to keep an eye on the time.

  • At best, you'll only have six hours before the tide changes.

  • But if not trying to escape, and trying too hard, are both bad choices,

  • then what are you supposed to do if you get stuck in quicksand?

  • The trick is to stay calm.

  • First, get rid of any heavy items that you're wearing or carrying,

  • as they'll only drag you deeper.

  • Then, try to lean as far back as you can to create more space for yourself.

  • Water will come in and fill the gaps you create, which will make it easier for you to move

  • and pull your body towards the surface.

  • If you can, grab a stick and wedge it underneath your back;

  • this will help to increase your leverage.

  • Hopefully, you'll get help from emergency services.

  • But if not, you can use these tips to get out on your own.

  • It will be a long and exhausting process since,

  • just to free your foot from a puddle of quicksand,

  • moving at a rate of one centimeter per second,

  • it would require the same amount of force as it does to lift a small car.

  • And once you're free, you'll probably be in a lot of pain.

  • With all that pressure from the densely packed sand,

  • you might emerge from the quicksand with permament nerve damage, or without a leg.

  • If you do manage to come out in one piece,

  • well, maybe tread a little more carefully in the future.

  • But don't let this one sucky experience keep you from another adventure.

  • Put your best foot forward, and take a walk on the wild side, next time on 'What If.'

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B1 中級

あなたが流砂の中に落ちた場合はどうなりますか? (What Happens If You Fall Into Quicksand?)

  • 1 1
    林宜悉 に公開 2021 年 01 月 14 日
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