Pratique du Shadowing: Could we survive prolonged space travel? - Lisa Nip - Apprendre l'anglais à l'oral avec YouTube

C1
Prolonged space travel takes a severe toll on the human body.
⏸ En pause
36 phrases
Si les phrases sont trop courtes ou trop longues, cliquez sur Edit pour les ajuster.
1
Prolonged space travel takes a severe toll on the human body.
2
Microgravity impairs muscle and bone growth, and high doses of radiation cause irreversible mutations.
3
As we seriously consider the human species becoming space-faring, a big question stands.
4
Even if we break free from Earth's orbit and embark on long-duration journeys among the stars, can we adapt to the extreme environments of space?
5
This won't be the first time that humans have adapted to harsh environments and evolved superhuman capabilities.
6
Not fantastical powers like laser vision or invisibility, but physiological adaptations for survival in tough conditions.
7
For example, on the Himalayan mountains where the highest elevation is nine kilometers above sea level, an unacclimated lowland human will experience symptoms of hypoxia, commonly known as mountain sickness.
8
At these altitudes, the body usually produces extra red blood cells, thickening the blood and impeding its flow.
9
But Himalayans who have lived on these mountains for thousands of years permanently evolved mechanisms to circumvent this process and maintain normal blood flow.
10
Cases like that prove that humans can develop permanent lifesaving traits.
11
But natural adaptation for entire human populations could take tens of thousands of years.
12
Recent scientific advances may help us accelerate human adaptation to single generations.
13
To thrive as a species during space travel, we could potentially develop methods to quickly program protective abilities into ourselves.
14
A beta version of these methods is gene therapy, which we can currently use to correct genetic diseases.
15
Gene editing technology, which is improving rapidly, allows scientists to directly change the human genome to stop undesirable processes or make helpful substances.
16
An example of an unwanted process is what happens when our bodies are exposed to ionizing radiation.
17
Without an atmospheric barrier and a magnetic field like Earth's, most planets and moons are bombarded with these dangerous subatomic particles.
18
They can pass through nearly anything and would cause potentially cancerous DNA damage to space explorers.
19
But what if we could turn the tables on radiation?
20
Human skin produces a pigment called melanin that protects us from the filtered radiation on Earth.
21
Melanin exists in many forms across species, and some melanin-expressing fungi use the pigment to convert radiation into chemical energy.
22
Instead of trying to shield the human body, or rapidly repair damage, we could potentially engineer humans to adopt and express these fungal, melanin-based energy-harvesting systems.
23
They'd then convert radiation into useful energy while protecting our DNA.
24
This sounds pretty sci-fi, but may actually be achievable with current technology.
25
But technology isn't the only obstacle.
26
There are ongoing debates on the consequences and ethics of such radical alterations to our genetic fabric.
27
Besides radiation, variation in gravitational strength is another challenge for space travelers.
28
Until we develop artificial gravity in a space ship or on another planet, we should assume that astronauts will spend time living in microgravity.
29
On Earth, human bone and muscle custodial cells respond to the stress of gravity's incessant tugging by renewing old cells in processes known as remodeling and regeneration.
30
But in a microgravity environment like Mars, human bone and muscle cells won't get these cues, resulting in osteoporosis and muscle atrophy.
31
So, how could we provide an artificial signal for cells to counteract bone and muscle loss?
32
Again, this is speculative, but biochemically engineered microbes inside our bodies could churn out bone and muscle remodeling signaling factors.
33
Or humans could be genetically engineered to produce more of these signals in the absence of gravity.
34
Radiation exposure and microgravity are only two of the many challenges we will encounter in the hostile conditions of space.
35
But if we're ethically prepared to use them, gene editing and microbial engineering are two flexible tools that could be adapted to many scenarios.
36
In the near future, we may decide to further develop and tune these genetic tools for the harsh realities of space living.

Télécharger l'application

Notation IA pour chaque phrase que vous prononcez

Scanner pour télécharger
Scanner pour télécharger
Download on theApp Store
Get it onGoogle Play
TRENDING

Populaires

Why practice speaking with this video?

This engaging video, "Could we survive prolonged space travel? - Lisa Nip," offers an excellent context for English learners to improve their speaking skills. By focusing on the scientific and philosophical implications of space travel, it provides a rich vocabulary and a compelling narrative that can enhance your understanding of complex topics.

Practicing speaking with this video allows you to develop fluency while discussing advanced concepts. Engaging with challenging material, like the potential for genetic adaptation in space exploration, not only improves your language skills but also boosts your confidence in academic discussions. This is particularly beneficial for those preparing for exams like IELTS, where sophisticated vocabulary and clear articulation are crucial.

Grammar & Expressions in Context

As you watch the video, pay attention to these key grammatical structures that Lisa Nip uses effectively:

  • Conditional sentences: For example, "What if we could turn the tables on radiation?" This structure is useful for expressing hypothetical situations, enabling you to articulate your own possibilities and scenarios in conversations.
  • Present continuous tense: Phrases like "scientists are improving rapidly" illustrate ongoing actions, which is vital in discussions that involve current developments. Mastering this tense will help you convey your thoughts about ongoing projects or research.
  • Passive voice: Expressions such as "are bombarded with these dangerous subatomic particles" are commonly used in scientific discourse. Understanding and employing passive constructions can elevate your academic speaking styles, making your arguments more formal and objective.
  • Modals for speculation: Words like "could" and "may" demonstrate how to express uncertainty or possibility, critical in discussions where research outcomes are not yet definitive.

Common Pronunciation Traps

While practicing with this video, you may encounter some pronunciation challenges:

  • “Microgravity”: This term features a complex combination of sounds that might be tricky. Focus on the separation of the syllables - “mi-cro-grav-i-ty” - to articulate it clearly.
  • “Acclimated”: Students often struggle with this word. Break it down into “ac-cli-mat-ed” to avoid slurring the sounds.
  • “Physiological”: The length and complexity can trip you up. Practice saying it slowly: “phy-si-o-lo-gi-cal.” Emphasize the correct syllables to enhance clarity.
  • “Evolved”: Pay close attention to the vowel sounds here, ensuring you pronounce it distinctly without rushing, as it can often blend into other words when speaking quickly.

By shadowing the speech in this video, learners can practice with authentic content, boost their vocabulary, and improve their English pronunciation, making it an invaluable resource for those looking to enhance their speaking skills.

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.

☕ Offrez-nous un café