Pratique du Shadowing: Four ways to understand the Earth's age - Joshua M. Sneideman - Apprendre l'anglais à l'oral avec YouTube

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How old is the Earth?
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How old is the Earth?
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Well, by counting the number of isotopes in a sample of rock that's undergone radioactive decay, geologists have estimated the Earth's birthday, when it first formed from a solar nebula, to be 4.6 billion years ago.
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But just how long is that really?
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Here's some analogies that might help you understand.
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For example, let's imagine the entire history of Earth until the present day as a single calendar year.
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On January 1st, the Earth begins to form.
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By March 3rd, there's the first evidence of single-celled bacteria.
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Life remains amazingly unicellular until November 11th when the first multicellular organisms, known as the Ediacaran fauna, come along.
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Shortly thereafter, on November 16th at 6:08 p.m.
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is the Cambrian Explosion of life, a major milestone, when all of the modern phyla started to appear.
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On December 10th at 1:26 p.m., the dinosaurs first evolve but are wiped out by an asteroid just two weeks later.
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On December 31st, the mighty Roman empire rises and falls in just under four seconds.
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And Columbus sets sail for what he thinks is India at three seconds to midnight.
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If you try to write the history of the Earth using just one page per year, your book would be 145 miles thick, more than half the distance to the international space station.
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The story of the 3.2 million year-old Australopithecine fossil known as Lucy would be found on the 144th mile, just over 500 feet from the end of the book.
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The United States of America's Declaration of Independence would be signed in the last half-inch.
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Or if we compared geologic time to a woman stretching her arms to a span of six feet, the simple act of filing her nails would wipe away all of recorded human history.
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Finally, let's imagine the history of the Earth as your life: from the moment you're born to your first day of high school.
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Your first word, first time sitting up, and first time walking would all take place while life on Earth was comprised of single-celled organisms.
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In fact, the first multicellular organism wouldn't evolve until you were 12 years old and starting 7th grade, right around the time your science teacher is telling the class how fossils are formed.
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The dinosaurs don't appear until three months into 8th grade and are soon wiped out right around spring break.
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Three days before 9th grade begins, when you realize summer is over and you need new school supplies, Lucy, the Australopithecine, is walking around Africa.
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As you finish breakfast and head outside to catch your bus 44 minutes before school, the Neanderthals are going extinct throughout Europe.
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The most recent glacial period ends as your bus drops you off 16 minutes before class.
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Columbus sets sail 50 seconds before class as you're still trying to find the right classroom.
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The Declaration of Independence is signed 28 seconds later as you look for an empty seat.
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And you were born 1.3 seconds before the bell rings.
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So, you see, the Earth is extremely, unbelievably old compared to us humans with a fossil record hiding incredible stories to tell us about the past and possibly the future as well.
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But in the short time we've been here, we've learned so much and will surely learn more over the next decades and centuries, near moments in geological time.

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Why practice speaking with this video?

Practicing speaking with the video "Four ways to understand the Earth's age" by Joshua M. Sneideman is an excellent way to enhance your English skills. The speaker uses vivid analogies and engaging storytelling techniques, making complex scientific concepts accessible and relatable. By shadowing this video, you can improve your vocabulary while understanding various contexts in which these terms are used. As you repeat phrases and sentences, you not only enhance your speaking fluency but also deepen your comprehension of the material.

Additionally, using a shadowing site or shadowing app while practicing can provide a structured environment allowing you to mimic the speaker's tone and rhythm effectively. This will help you improve English pronunciation, making your speech clearer and more engaging.

Grammar & Expressions in Context

  • Countable and Uncountable Nouns: The speaker discusses both "isotopes" and "rock," demonstrating the difference between countable nouns (like isotopes) and uncountable nouns (like rock). Practicing these can refine your grammatical accuracy.
  • Past Simple Tense: Phrasing such as "the dinosaurs first evolve" improves your understanding of how to narrate past events. Shadowing these sentences can help you practice the correct verb forms.
  • Comparative Structures: The speaker uses comparisons like "more than half the distance to the international space station," which can teach you how to form effective comparative structures in English. Experimenting with your own sentences using this structure can enhance your expressive ability.
  • Imaginary Scenarios: The use of "let's imagine" sets a hypothetical context that can inspire you to create your own imaginative scenarios in English. This is a useful technique for practicing expressive speaking.

Common Pronunciation Traps

One of the tricky aspects of the video is the proper pronunciation of specific scientific terms, such as "isotopes" and "Ediacaran." These words can be challenging for non-native speakers. Using a shadowing technique, you can practice these terms repeatedly to master their pronunciation within context.

Additionally, phrases like "Cambrian Explosion" may present difficulties due to their length and specific sounds. Be attentive to the rhythm and stress within such phrases while using a shadowing app to help improve your pronunciation.

Don’t forget to focus on intonation and pace. The speaker's delivery is lively, and mimicking this style can significantly boost your overall speaking performance. Engaging with the content on a shadowing site allows you to absorb not only the sounds but also the energy of natural speech, which is crucial for effective communication.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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