Prática de Shadowing: What If Dinosaurs Never Stopped Evolving for 66 Million Years? - Aprenda a falar inglês com vídeo
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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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Vocabulário e dicas de fala para esta lição
Esta aula de conversação de nível B2 usa o vídeo “What If Dinosaurs Never Stopped Evolving for 66 Million Years?”. As palavras que mais se repetem: dinosaur, species, predators, evolution, Earth. Este vídeo tem 89 frases e 1197 palavras para praticar shadowing. A fala dura 8:38. O falante mantém um ritmo estável de cerca de 139 palavras por minuto, confortável para o shadowing. Apenas 79% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente. 14 das 89 frases são perguntas, por isso é um bom treino para a entonação de perguntas e respostas curtas.
Vocabulário principal deste vídeo
As 15 palavras mais avançadas do vídeo, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| dinosaur substantivo | /ˈdaɪnəsoɹ/ | dinossauro |
| predator substantivo | /ˈpɹɛd.ə.tɚ/ | predador |
| evolve verbo | /ɪˈvɑlv/ | desenvolver, elaborar |
| asteroid substantivo | /ˈæst(ə)ɹɔɪd/ | asteroide, planetoide |
| evolutionary adjetivo | /ˌiː.vəˈluː.ʃən.ɛɹ.i/ | evolutivo |
| prey substantivo | /pɹeɪ/ | presa |
| extinct adjetivo | /ɪkˈstɪŋkt/ | apagado, extinguido |
| meter substantivo | /ˈmitəɹ/ | contador |
| agility substantivo | /əˈd͡ʒɪl.ɪ.ti/ | agilidade |
| brontosaurus substantivo | brontossauro | |
| mammal substantivo | /ˈmæməl/ | mamífero |
| pterodactyl substantivo | /ˌtɛɹ.əˈdæk.təl/ | pterodáctilo |
| velociraptor substantivo | /vəˌlɒsɪˈɹæptɚ/ | velociraptor |
| dominate verbo | /ˈdɑ.məˌneɪt/ | dominar |
| adapt verbo | /əˈdæpt/ | adaptar |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| bring up verbo | criar |
Frases que vale a pena repetir
Frases curtas e completas do vídeo que você pode usar na conversa do dia a dia:
- 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 neste vídeo
As estruturas que o falante mais usa, com as palavras exatas do vídeo:
| Estrutura | No vídeo |
|---|---|
| Voz passiva be + particípio passado — o foco está no que acontece, não em quem faz | were disrupted · were likely covered · would be known |
| Present perfect have/has + particípio passado — uma ação passada que ainda importa agora | have changed · it's always been · have developed |
Pronúncia para ficar de olho
O falante usa 12 contrações e formas reduzidas, como we'd, wouldn't, you'd. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “th”: mammoth /ˈmæməθ/, unfathomable /ˌʌnˈfæð(ə)məb(ə)l/, withstand /wɪðˈstænd/, feather /ˈfɛðə/, aftermath /ˈæf.tɚˌmæθ/
- Os sons de “sh” e “zh”: evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/, vanish /ˈvænɪʃ/, extinction /ɪkˈstɪŋkʃən/, vicious /ˈvɪʃəs/, collision /kəˈlɪʒn̩/
- Palavras longas — acerte a sílaba tônica: evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/, agility /əˈd͡ʒɪl.ɪ.ti/, pterodactyl /ˌtɛɹ.əˈdæk.təl/, velociraptor /vəˌlɒsɪˈɹæptɚ/, notoriously /nə(ʊ)ˈtɔː.ɹɪ.əs.li/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: asteroid /ˈæst(ə)ɹɔɪd/, extinct /ɪkˈstɪŋkt/, dominate /ˈdɑ.məˌneɪt/, adapt /əˈdæpt/, gauntlet /ˈɡɔːnt.lət/
- /l/ final — a língua toca o céu da boca, não vira “u”: mammal /ˈmæməl/, pterodactyl /ˌtɛɹ.əˈdæk.təl/, hurtle /ˈhɜɹt(ə)l/, reptile /ˈɹɛp.taɪl/, unfathomable /ˌʌnˈfæð(ə)məb(ə)l/
- /h/ — um sopro suave, diferente do “r”: herbivore /ˈ(h)ɜːɹbɪvɔːɹ/, hurtle /ˈhɜɹt(ə)l/, prehistoric /ˌpɹiː.hɪsˈtoɹ.ɪk/, helpless /ˈhɛlplɪs/, hawk /ˈhɔːk/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como dinosaur, predator, evolve.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.