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  • This video was sponsored by Dashlane.

    這支影片由 Dashlane 贊助播出。

  • Hi, this is Emily, from MinuteEarth.

    嗨,我是 MinuteEarth 的 Emily。

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


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

    但 4000 英里以北,在熱帶地區的加拉巴哥群島上,你也可以找到企鵝的蹤跡,

  • because of something called the Cromwell Current.


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

    這個寒流在海面 100 公尺之下由西流往東,

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


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


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


  • 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.


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


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


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


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


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


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


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


  • 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.


  • In fact, the world's only northern penguins are the Galapagos penguins that live at the tip of Isabela Island, just a hairor a featherabove the equator.


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

    我不是企鵝,我是 Ever,MinuteEarth 的創意總監。

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


  • 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.


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

    但自從開始用了 Dashlane,我的人生改變了。

  • 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.

    Dashlane 為我所有帳號產生並儲存安全密碼,也協助我變更密碼,所以我的記憶可以用來存放更重要的事情

  • 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.

    如果你想體驗安全穩固的密碼帶來的心神平靜,今天就點擊資訊欄的連結,免費試用 Dashlane,

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

    也可以使用促銷代碼 minuteearth 獲得 Dashlane Premium 9 折優惠。

This video was sponsored by Dashlane.

這支影片由 Dashlane 贊助播出。

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B1 中級 中文 美國腔 企鵝 海水 養分 密碼 洋流 混合

為什麼赤道上有企鵝?(Why Are There Penguins At The Equator?)

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    Evangeline 發佈於 2021 年 03 月 14 日