Shadowing Practice: Four Places We Might Find Aliens - Learn English Speaking with Video
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We don't actually know if aliens exist, but if they do, their cells probably have a special type of membrane.
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And that knowledge alone tells us where we can look for them, and maybe even what they'll be like.
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Hi, I'm David, and this is MinuteEarth.
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There are lots of different ways scientists can search for life on other planets.
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They can listen for radio signals from alien civilizations.
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They can scan distant atmospheres for the chemical fingerprints life leaves behind.
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And they can send spacecraft to sample places in our own solar system where life might be hiding.
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Or they can search for places that have the right conditions for a particular type of membrane to form.
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This last one is actually a pretty powerful tool for zeroing in on possible extraterrestrial life,
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because virtually every cell on Earth is wrapped in a membrane that keeps its contents inside,
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builds up a gradient by piling charged particles on one side, and then captures energy as those particles flow back through to the other.
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These membranes, we can call them electrochemical membranes, are so fundamental to life that many experts think that extraterrestrial life will likely have them too.
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On Earth, electrochemical membranes are formed from a specific set of elements, carbon, hydrogen, oxygen, nitrogen, and phosphorus, which can form molecules that,
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in the presence of liquid water, assemble into, well, membranes.
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And those membranes in turn form the foundation of life on Earth.
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So one way to find extraterrestrial life is to look for other worlds
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that have those same elements and the liquid water
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that would allow them to self -assemble and some sort of energy to power the life forms.
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And there are two of those worlds relatively nearby.
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Saturn's moon Enceladus has all of those elements and liquid water, though the ocean is buried under a thick shell of ice.
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So the membranes crucial to life could potentially form on Enceladus.
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But without direct sunlight, there's not much energy available.
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Any life
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that formed there would likely have to rely on the trickle of energy coming from hydrothermal vents on the ocean floor.
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So I imagine that any life there would be small and live right next to those vents.
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Jupiter's moon Europa also has all five of those membrane -building elements and a liquid ocean under an icy shell.
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But unlike energy -poor Enceladus, Europa is constantly being bombarded by radiation from Jupiter,
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and experiences much more tidal heating as it gets pushed and pulled by the massive planet.
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So if there is life on Europa, perhaps it's faster moving because it has more access to that energy.
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And then there's K2 -18b, a planet about 120 light -years away from us.
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From spectroscopy, we're pretty sure that it has at least three of the required elements to build
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Earth -like electrochemical membranes, and it may even have liquid water.
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But it's also surrounded by a thick layer of hydrogen gas, which for complicated chemistry reasons,
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some scientists speculate would lead not to the development of lots of individual membranes, but instead one big one.
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So that makes me envision alien life on K2 -18b that's not multiple organisms, but instead a single giant film that covers the entire world.
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And life may not actually be limited to worlds with exact
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Earth -like chemistry, because scientists think that in some cases, electrochemical membranes might be able to form from slightly different ingredients.
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The clouds surrounding
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Venus, for example, have no liquid water.
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So Earth -like membranes couldn't form there.
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And even if they did, the clouds are made of concentrated sulfuric acid, which would destroy those membranes on contact.
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What scientists have discovered, though, is that electrochemical membranes built with sulfur can actually self -assemble and survive in strong acid.
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So any life on Venus would probably have to form inside droplets of sulfuric acid.
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And because those droplets would have access to plenty of energy from sunlight as they floated up and down in the clouds,
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I picture excited aliens bopping around in their little acid bubbles.
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Again, we still don't know whether aliens exist.
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But focusing on the likelihood that they'll have electrochemical membranes doesn't just tell us where to look.
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It also hints that whatever we find could be deeply weird.
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Woordenschat en spreektips bij deze les
Deze spreekles is gebaseerd op de video “Four Places We Might Find Aliens”. Deze woorden komen het vaakst terug: membrane, energy, electrochemical, liquid, Earth. Deze video bevat 48 zinnen en 718 woorden om na te spreken. Het gesproken deel duurt 3:25. De spreker praat snel, ongeveer 210 woorden per minuut, dus reken op verbonden en ingeslikte klanken. Slechts 79% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden, dus de woordenschat is pittig.
Belangrijke woorden in deze video
15 woorden uit de video die het leren waard zijn, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| liquid zelfstandig naamwoord | /ˈlɪk.wɪd/ | vloeistof |
| element zelfstandig naamwoord | /ˈɛləmənt/ | element |
| acid zelfstandig naamwoord | /ˈæsɪd/ | zuur |
| scientist zelfstandig naamwoord | /ˈsaɪəntəst/ | wetenschapper, wetenschapster |
| membrane zelfstandig naamwoord | /ˈmɛm.bɹeɪn/ | membraan |
| cloud zelfstandig naamwoord | /ˈklaʊ̯d/ | wolk |
| assemble werkwoord | /əˈsɛm.bəl/ | in elkaar zetten |
| thick bijvoeglijk naamwoord | /θɪk/ | dik, dikke |
| shell zelfstandig naamwoord | /ʃɛl/ | schelp |
| chemistry zelfstandig naamwoord | /ˈkɛm.ɪ.stɹi/ | chemie, scheikunde |
| hydrogen zelfstandig naamwoord | /ˈhaɪdɹəd͡ʒ(ə)n/ | waterstof |
| particle zelfstandig naamwoord | /ˈpɑɹtək(ə)l/ | deeltje, partikel |
| sunlight zelfstandig naamwoord | /ˈsʌnˌlaɪt/ | zonlicht |
| surround werkwoord | /səˈɹaʊnd/ | omgeven, omringen |
| complicated bijvoeglijk naamwoord | /ˈkɑm.plɪˌkeɪ.tɪd/ | ingewikkeld, gecompliceerd |
Phrasal verbs die je zult horen
| Woord | Betekenis |
|---|---|
| build up werkwoord | opstapelen |
| leave behind werkwoord | achterlaten |
Uitspraak om op te letten
De spreker gebruikt 8 samentrekkingen en verkorte vormen, zoals don't, they'll, couldn't. Spreek ze kort uit, zoals je ze hoort.
- De klanken “sh” en “zh”: shell /ʃɛl/, capture /ˈkæp.(t)ʃɚ/, potentially /pəˈtɛnʃ(ə)li/, crucial /ˈkɹuː.ʃəl/, radiation /ˌɹeɪ.diˈeɪ.ʃən/
- Lange woorden — let op de klemtoon: complicated /ˈkɑm.plɪˌkeɪ.tɪd/, potentially /pəˈtɛnʃ(ə)li/, fundamental /ˌfʌn.dəˈmɛn.təl/, radiation /ˌɹeɪ.diˈeɪ.ʃən/, virtually /ˈvɚ.t͡ʃə.wə.li/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: liquid /ˈlɪk.wɪd/, acid /ˈæsɪd/, cloud /ˈklaʊ̯d/, surround /səˈɹaʊnd/, complicated /ˈkɑm.plɪˌkeɪ.tɪd/
- /æ/ — opener dan de Nederlandse “e”: acid /ˈæsɪd/, atmosphere /ˈætməsˌfɪɹ/, capture /ˈkæp.(t)ʃɚ/, wrap /ɹæp/, scan /skæn/
- /g/ — een harde plofklank, geen Nederlandse “g”: ingredient /ɪnˈɡɹiːdi.ənt/, organism /ˈɔɹ.ɡəˌnɪz.əm/, fingerprint /ˈfɪŋɡɚˌpɹɪnt/, gradient /ˈɡɹeɪdiənt/
Zo oefen je met deze video
- Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
- Begin op 0,75× snelheid, spreek zin voor zin na en ga terug naar normale snelheid zodra het makkelijk gaat.
- Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als liquid, element, acid.
Wat is de Shadowing-techniek?
Shadowing is een wetenschappelijk onderbouwde taalleermethode die oorspronkelijk is ontwikkeld voor professionele tolkentraining en gepopulariseerd door polyglot Dr. Alexander Arguelles. De methode is eenvoudig maar krachtig: je luistert naar native Engelse audio en herhaalt het onmiddellijk hardop — als een schaduw die de spreker volgt met slechts 1–2 seconden vertraging. In tegenstelling tot passief luisteren of grammaticadrills, dwingt shadowing je hersenen en mondspieren om echte spraakpatronen tegelijkertijd te verwerken en te reproduceren. Onderzoek toont aan dat het de uitspraaknauwkeurigheid, intonatie, ritme, verbonden spraak, luisterbegrip en spreekvaardigheid aanzienlijk verbetert — waardoor het een van de meest effectieve methoden is voor IELTS Speaking-voorbereiding en echte Engelse communicatie.