Hi, this is Emily, from MinuteEarth.

こんにちは、MinuteEarthのエミリーです。

Penguins like the cold - they're built for it, and most live in the cold waters near Antarctica.

ペンギンは寒いのが好きだ - 彼らはそれのために構築されており、ほとんどは南極近くの冷たい水の中に住んでいます。

But over 4000 miles north, in the tropical Galapagos Islands, you can also find penguins,

しかし、北へ4000マイル以上、熱帯のガラパゴス諸島では、ペンギンを見つけることもできます。

because of something called the Cromwell Current.

クロムウェル電流と呼ばれるもののせいで

This cold-water current flows from west to east at about a hundred meters below the ocean surface,

この冷水流は、海の下100メートル付近を西から東に向かって流れています。

until it collides with the underwater part of the Galapagos islands and turns upward towards the surface.

ガラパゴス諸島の海中部分に衝突して上向きになるまで

The current helps the penguins stay cool, but even more importantly, it helps them eat.

表面に向かって

That's because it brings together nutrients and sunlight, the key ingredients that make green algae thrive, which allows penguins' food to thrive too.

海流はペンギンの涼しさを保つのに役立ちますが、それ以上に重要なのは、ペンギンが食べるのを助けることです。

Across most of the ocean, there's a sort of cruel separation between these ingredients, because sunlight only penetrates the top layer of water, while nutrients sink.

それは、栄養素と太陽光という重要な成分を一緒にしてくれるからです。

What's more, because the sun-warmed surface waters are less dense than the colder waters below, the two layers don't easily mix.

緑藻類が繁茂しているので、ペンギンの餌も繁茂しています。

It takes winds or a current to bring the nutrient-rich waters up to the sunlit surface.

海の大部分では、これらの成分の間には、ある種の残酷な分離があります。

So, the ocean is like a salad dressing, where the denser vinegar stays trapped below the oil until you shake it up.

なぜなら、太陽光は水の最上層にしか浸透しないのに対し、栄養分は沈んでしまうからです。

Where the ocean doesn't get shaken up, both green algae and the critters that eat it are relatively sparse.

さらに、太陽で暖められた表層水は、冷たい水よりも密度が低いので

But where it mixes, like at the Galapagos Islands, algae and the rest of the food chain can thrive.

以下、2つの層が簡単には混ざりません。

Of course, penguins are more common in colder climates, partly because icy surface waters mix more readily with cold, nutrient-rich waters below.

栄養豊富な水を太陽に照らされた水面に浮かび上がらせるためには、風や潮流が必要です。

But the world's cold, northern oceans don't have any penguins, because these flightless birds evolved in the South,

本質的には、海はサラダのドレッシングのようなもので、濃厚な酢が下に閉じ込められたままになっています。

and it seems that although changes in climate over time may have helped them migrate northwards, there's simply too much warm, nutrient-poor water between them and the Arctic.

振ってまでオイルを

In fact, the world's only northern penguins are the Galapagos penguins that live at the tip of Isabela Island, just a hair – or a feather – above the equator.

海が揺れないところでは、緑藻もそれを食べる生物も

I'm not a penguin - I'm Ever, the creative director here at MinuteEarth.

は比較的まばらです。

Instead of fish, I need the internet to survive, and I have a ton of different accounts on all sorts of different websites.

しかし、それはガラパゴス諸島、藻類のように、混合する場所 - と食品の残りの部分

For years, I created my passwords by relying on repetition, mnemonic devices and even post-it notes, which meant that they were very insecure and sometimes I lost them.

チェーンは繁栄することができます。

But since we started using Dashlane, my life has changed.

もちろん、ペンギンは寒い気候の方が一般的ですが、その理由の一つには氷の表層水があることが挙げられます。

Dashlane generates and stores secure passwords for all my accounts and helps me change them when the time comes, so my memory is free to store more important things.

下の冷たくて栄養価の高い水と混ざりやすくなります。

If you also want to experience the peace of mind that comes with having secure passwords, try Dashlane for free today by clicking on the link in the video's description.

しかし、世界の寒冷な北の海にはペンギンがいないのです。

You can also use the special promo code "minuteearth" to get 10% off Dashlane Premium.

鳥類は南部で進化し、時間の経過とともに気候が変化しても