Shadowing Practice: What If Dinosaurs Never Stopped Evolving for 66 Million Years? - Learn English Speaking with Video
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65 million years ago, dinosaurs ruled the Earth.
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They dominated each time period they were in, becoming the kings of the animal kingdom.
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Then suddenly, that all changed.
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An asteroid came for Earth and wiped all the dinosaurs out, causing them to go extinct.
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But what if things were different?
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Time to turn back the clocks over 65 million years to see just what course evolution would have taken
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if dinosaurs still roamed Earth.
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In what ways would their bodies have changed over this time?
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How would they adapt to our planet's changing environment?
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And would some dinosaurs remain at the top of the food chain?
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A food chain that now includes you?
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This is What If?
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And here's what would happen if dinosaurs never stopped evolving.
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Before we reimagine the course of evolutionary history,
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let's explore just what kind of catastrophic series of events could have led to the extinction of
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so many dinosaur species in the first place.
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Going back about 66 million years into our planet's past, the Cretaceous Period would be nearing its end.
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but not before going out with a bang.
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A big one.
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No, not that big bang.
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An asteroid named Chicxulub, with a diameter of about 10 km,
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hurtled through space and our atmosphere to its final destination around the Yucatan Peninsula in modern-day Mexico.
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The impact of this giant hunk of space rock released an amount of energy equivalent to about 100 trillion tons of TNT.
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This explosion was billions of times more powerful than the atomic bombs dropped by the United States in World War II.
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In the immediate aftermath, it led to massive tsunamis and widespread fires,
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and filled the atmosphere with so much debris that it blocked the Sun.
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Temperatures dropped.
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Food chains were disrupted.
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As a result, 75% of all life vanished from Earth.
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Luckily, in our scenario, they'll never know what didn't hit them.
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When you look back through the evolutionary history of life on Earth, It's important to remember that it's always been a game of survival.
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And only the fittest species survive.
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That would mean that of all the dinosaur species that ever existed,
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not all of them would survive the millions of years of natural selection to still be around today.
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But let's see if a couple of our most famous prehistoric friends make it through this genetic gauntlet.
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Starting at the top of the food chain.
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one of the greatest apex predators of all time, the Tyrannosaurus rex.
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Many millions of years ago, a T rex would have used some of its highly sophisticated senses to hunt prey.
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These beasts likely had a range of visions similar to, or better than, hawks and eagles.
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The science suggests that throughout the T rex's evolution, their sight improved as their facial structure became narrower and their eyes grew larger.
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After many more millions of years of evolution, their vision might have improved to unfathomable levels.
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Instead of spotting prey hundreds of meters away, they could see their next meal several kilometers in the distance.
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But what about other parts of their bodies?
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Besides their notoriously tiny arms, the T-Rex was a towering figure, standing just under 4 meters tall.
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Over time, natural selection might have favored T-Rexes with longer, more muscular arms.
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By now, they might have developed better agility and range of motion to become even more formidable predators.
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And they wouldn't be the only predators that may have become even more dominant over time.
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Velociraptors were famous for their speed, agility, and hunting techniques.
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And they were intelligent, too.
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Maybe not as bright as movies like Jurassic Park make them seem, but certainly they had a leg up on some of their dumber plant-eating prey.
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With millions more years of evolution, these creatures would have developed highly advanced hunting techniques.
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Another thing Hollywood doesn't show you is that evidence suggests that raptors were likely covered in feathers,
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and that their evolutionary trajectory is very closely linked to the emergence of birds.
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Imagine over time that these feisty predators evolved to have wings, and could hunt helpless prey, like humans, from the skies.
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Well, more likely it would be your pets you'd have to worry about.
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Velociraptors were smaller dinos, only about 45 kg, and less than 2 m in length.
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But keep an eye on Rufus and Garfield.
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And maybe on the small children, too.
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Now, in terms of dinosaurs that already dominated the skies, the aviation skills of pterodactyls would have also continued to develop and improve.
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By the time they went extinct, these creatures were the largest known flying animals, with wingspans ranging from 2 to 11 meters.
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Ugh.
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If they continued to adapt to our planet's changing atmosphere and geographical shifts,
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well, who's to say these gigantic flying reptiles wouldn't have continued to grow?
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Can you imagine a day in the park, ruined by the surprise visit of one or more pterodactyls the size of a small building?
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Now, that's something you'd have to worry about.
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Not all dinosaurs would have evolved to become bigger, badder predators.
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Okay, maybe gentle giants like the brontosaurus could have continued growing in size, but they might have developed other features to make them less vulnerable to predators.
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For example, their skin.
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Natural selection might have favored those with increasingly thicker outer layers that could withstand the powerful bites of creatures like the T-Rex,
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or whatever it is the T-Rex would be known as now.
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Like for the other species, there'd be so many enormous environmental changes between their era and now.
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The brontosaurus was a herbivore, and as plant species underwent their own evolutionary process,
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these dinosaurs would likely have developed a more complex digestive system, similar to those of mammals.
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And this brings up another interesting dilemma.
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If these creatures never went extinct and kept evolving, uninterrupted by a pesky space rock?
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Would mammals like you be here today?
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Yeah, our earliest human ancestors evolved among creatures like mammoths and saber-toothed tigers.
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But now that we're adding in all these other species, only the fittest would survive.
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And in that case, human evolution could have taken an entirely different course too.
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Natural selection would have likely favored genes that would make us smaller and faster to avoid being eaten.
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And with the possibility that we'd be living among other highly intelligent species like raptors, our social structures might be completely different too.
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Instead of being the most dominant species on the planet, there's a strong chance we'd have to compete with these other dangerous predators.
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If at any moment we could be raided by a pack of vicious T-Rexes, would we ever have settled down in one place?
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Instead of human civilization evolving in great communities, maybe we'd only survive as solitary nomadic hunter-gatherers.
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Evolution is a mysterious puzzle that only time knows the answers to.
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If we reverse the course of one event, like the collision of the Chicxulub, there's basically no limit to how different your world could be today.
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Which makes me wonder, what would happen if an asteroid the same size hit Earth today?
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Or maybe a bigger asteroid?
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Well, that's a story for another WHAT IF.
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Vocabulario y notas de pronunciación para esta lección
Esta lección de conversación de nivel B2 se basa en el vídeo “What If Dinosaurs Never Stopped Evolving for 66 Million Years?”. Las palabras que más se repiten: dinosaur, species, predators, evolution, Earth. Este vídeo tiene 89 frases y 1197 palabras para practicar shadowing. La parte hablada dura 8:38. El hablante mantiene un ritmo constante de unas 139 palabras por minuto, cómodo para el shadowing. Solo el 79 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente. 14 de sus 89 frases son preguntas, así que sirve para practicar la entonación de las preguntas y las respuestas cortas.
Vocabulario clave de este vídeo
Las 15 palabras más avanzadas del vídeo, con su pronunciación y significado:
| Palabra | Pronunciación | Significado |
|---|---|---|
| dinosaur sustantivo | /ˈdaɪnəsoɹ/ | dinosaurio |
| predator sustantivo | /ˈpɹɛd.ə.tɚ/ | predador, depredador |
| evolve verbo | /ɪˈvɑlv/ | desarrollar |
| asteroid sustantivo | /ˈæst(ə)ɹɔɪd/ | asteroide, planetoide |
| evolutionary adjetivo | /ˌiː.vəˈluː.ʃən.ɛɹ.i/ | evolutivo, evolucionista |
| prey sustantivo | /pɹeɪ/ | presa |
| extinct adjetivo | /ɪkˈstɪŋkt/ | extinto |
| meter sustantivo | /ˈmitəɹ/ | medidor, contador |
| agility sustantivo | /əˈd͡ʒɪl.ɪ.ti/ | agilidad |
| mammal sustantivo | /ˈmæməl/ | mamífero |
| pterodactyl sustantivo | /ˌtɛɹ.əˈdæk.təl/ | pterodáctilo |
| velociraptor sustantivo | /vəˌlɒsɪˈɹæptɚ/ | velocirráptor |
| dominate verbo | /ˈdɑ.məˌneɪt/ | dominar |
| adapt verbo | /əˈdæpt/ | adaptar, ajustar |
| ancestor sustantivo | /ˈæn.sɛs.tɚ/ | ancestro, antepasado |
Phrasal verbs que vas a escuchar
| Palabra | Significado |
|---|---|
| bring up verbo | levantar, alzar |
| look back verbo | recordar, volver la cabeza |
Frases que vale la pena repetir
Frases cortas y completas del vídeo que puedes reutilizar en la conversación diaria:
- How would they adapt to our planet's changing environment?
- A food chain that now includes you?
- Would mammals like you be here today?
Gramática en este vídeo
Las estructuras que más usa el hablante, con las palabras exactas del vídeo:
| Estructura | En el vídeo |
|---|---|
| Voz pasiva be + participio pasado — importa lo que ocurre, no quién lo hace | were disrupted · were likely covered · would be known |
| Present perfect have/has + participio pasado — una acción pasada que sigue importando ahora | have changed · it's always been · have developed |
Pronunciación a tener en cuenta
El hablante usa 12 contracciones y formas reducidas, como we'd, wouldn't, you'd. Dilas en su forma corta, tal como las oyes.
- Los sonidos de “th”: mammoth /ˈmæməθ/, unfathomable /ˌʌnˈfæð(ə)məb(ə)l/, withstand /wɪðˈstænd/, feather /ˈfɛðə/, aftermath /ˈæf.tɚˌmæθ/
- Los sonidos de “sh” y “zh”: evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/, vanish /ˈvænɪʃ/, extinction /ɪkˈstɪŋkʃən/, vicious /ˈvɪʃəs/, collision /kəˈlɪʒn̩/
- Palabras largas — cuida el acento: evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/, agility /əˈd͡ʒɪl.ɪ.ti/, pterodactyl /ˌtɛɹ.əˈdæk.təl/, velociraptor /vəˌlɒsɪˈɹæptɚ/, notoriously /nə(ʊ)ˈtɔː.ɹɪ.əs.li/
Sonidos difíciles para hispanohablantes:
- /v/ — no es /b/: los dientes tocan el labio inferior: evolve /ɪˈvɑlv/, evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/, velociraptor /vəˌlɒsɪˈɹæptɚ/, digestive /daɪˈdʒɛstɪv/, herbivore /ˈ(h)ɜːɹbɪvɔːɹ/
- /z/ — sonora, no /s/: puzzle /ˈpʌzəl/, civilization /ˌsɪv.ɪ.laɪˈzeɪ.ʃən/
- /dʒ/ — no es la “y” ni la “ch”: agility /əˈd͡ʒɪl.ɪ.ti/, digestive /daɪˈdʒɛstɪv/, trajectory /tɹəˈd͡ʒɛktəɹi/, gigantic /d͡ʒaɪˈɡæntɪk/, emergence /ɪˈmɝ.d͡ʒ(ə)ns/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Haz shadowing frase por frase a velocidad normal, repitiendo cada una hasta que tu ritmo coincida con el del hablante.
- Grábate y compara con el original, prestando atención a palabras como dinosaur, predator, evolve.
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.