Name: 零下40度還能睡得暖？！冰屋保暖原理超反直覺！ (How an Igloo Keeps you warm?)
Uploaded: 2026-01-28T21:01:20.000Z
Duration: 3 min 9 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

The temperature is 40 degrees below zero.

如果你待在外面，你會被凍死。

How can a shelter made of frozen water keep you from freezing to death?

用「結冰的水」做成的避難所，怎麼可能讓你不被凍死？

The answer lies in some surprising physics and the genius of Inuit engineering.

答案藏在一些出乎意料的物理原理，以及因紐特人的工程智慧之中。

Let's uncover today how an igloo keeps you warm.

今天就來揭開：冰屋到底怎麼讓你保持溫暖。

Right here, in Simple Things: Surprising Histories.

就在這裡，《Simple Things: Surprising Histories》。

首先，我們得先破解一個迷思。

固體冰其實是很糟糕的隔熱材料。

它大約有 90% 到 95% 都是被困住的空氣。

Think of it like a Styrofoam cup or a down jacket.

把它想像成保麗龍杯或羽絨外套。

Those tiny air pockets trapped between the snow crystals prevent heat from moving.

雪晶之間那些細小的空氣層，會阻止熱能傳導。

When the Inuit build an igloo, they aren't building an icebox.

當因紐特人蓋冰屋時，他們不是在打造一個冰箱。

They are essentially wrapping themselves in a giant white thermal blanket.

他們其實是在把自己包進一條巨大的白色保暖毯裡。

The walls stop your body heat from escaping into the blizzard outside.

牆壁會阻止你身體的熱量逃到外頭的暴風雪中。

But insulation is useless if there's no heat to trap.

但如果沒有熱可以留住，再好的隔熱也沒用。

The human body is a radiator, constantly giving off heat.

人體就像一台散熱器，會不停釋放熱量。

Because the snow walls are so reflective and insulating, that heat stays inside.

因為雪牆反射又保溫，這些熱就會留在裡面。

Traditionally, the Inuit also use a qulliq — a small stone lamp burning seal oil.

傳統上，因紐特人也會使用 qulliq——一種燃燒海豹油的小石燈。

Just that tiny flame, combined with body heat,

光是那一點點火焰，加上人體的熱量，

can raise the temperature inside to around 60℉ (15℃),

就能把室內溫度提高到大約華氏 60 度（約 15℃），

That is a massive difference created entirely by natural physics.

這種巨大的差異，完全是自然物理造成的。

If you look at a cross section of a traditional igloo, the floor isn't flat.

如果你看傳統冰屋的剖面圖，你會發現地板不是平的。

The entrance is usually a tunnel dug below the floor level.

入口通常是一條挖在地板高度以下的隧道。

Cold air is dense and heavy, so it sinks down into this tunnel,

冷空氣密度大、比較重，所以會往下沉到隧道裡，

被困在那裡，遠離主要生活空間。

同時，熱空氣比較輕，會往上升。

The Inuits sleep on a raised platform, elevated,

因紐特人會睡在抬高的平台上，

so they stay bathed in the warmest air near the top of the dome.

因此他們能待在圓頂上方最溫暖的空氣層中。

Over time, your body heat slightly melts the inner walls,

隨著時間，你的體溫會讓內牆微微融化，

which then refreeze into a layer of ice, sealing the cracks and making the structure windproof.

接著再重新結凍成一層冰，封住縫隙，讓整個結構更防風。

By understanding how air moves and how snow insulates,

透過理解空氣如何流動、以及雪如何隔熱，

the Inuit turn their harshest enemy, the cold, into their greatest shield.

因紐特人把最殘酷的敵人——寒冷——變成了最強的防護盾。

If you enjoyed this slice of history, stay warm and hit that subscribe button.

如果你喜歡這段歷史小故事，記得保暖，順便按下訂閱。

This is Simple Things: Surprising Histories, and we'll see you in the next story.

這裡是《Simple Things: Surprising Histories》，我們下個故事見。