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  • This video was sponsored by Dashlane.

  • Hi, this is Emily, from MinuteEarth.

  • 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,

  • 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,

  • 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.

  • 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.

  • 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.

  • 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.

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

This video was sponsored by Dashlane.

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Why Are There Penguins At The Equator?

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    Evangeline posted on 2021/03/14
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