TED Talks - آموزش زبان

🎃Halloween🎃 🆔 @BestIELTS_Podcast☜ 🆔 @BestIELTS_Podcast☜

🔴Could a Saturn moon harbor life? Two years ago here at TED I reported that we had discovered at Saturn, with the Cassini Spacecraft, an anomalously warm and geologically active region at the southern tip of the small Saturnine moon Enceladus, seen here. This region seen here for the first time in the Cassini image taken in 2005. This is the south polar region, with the famous tiger-stripe fractures crossing the south pole. And seen just recently in late 2008, here is that region again, now half in darkness because the southern hemisphere is experiencing the onset of August and eventually winter. And I also reported that we'd made this mind-blowing discovery -- this once-in-a-lifetime discovery of towering jets erupting from those fractures at the south pole, consisting of tiny water ice crystals accompanied by water vapor and simple organic compounds like carbon dioxide and methane. And at that time two years ago I mentioned that we were speculating that these jets might in fact be geysers, and erupting from pockets or chambers of liquid water underneath the surface, but we weren't really sure. However, the implications of those results -- of a possible environment within this moon that could support prebiotic chemistry, and perhaps life itself -- were so exciting that, in the intervening two years, we have focused more on Enceladus. We've flown the Cassini Spacecraft by this moon now several times, flying closer and deeper into these jets, into the denser regions of these jets, so that now we have come away with some very precise compositional measurements. And we have found that the organic compounds coming from this moon are in fact more complex than we previously reported. While they're not amino acids, we're now finding things like propane and benzene, hydrogen cyanide, and formaldehyde. And the tiny water crystals here now look for all the world like they are frozen droplets of salty water, which is a discovery that suggests that not only do the jets come from pockets of liquid water, but that that liquid water is in contact with rock. And that is a circumstance that could supply the chemical energy and the chemical compounds needed to sustain life. So we are very encouraged by these results. And we are much more confident now than we were two years ago that we might indeed have on this moon, under the south pole, an environment or a zone that is hospitable to living organisms. Whether or not there are living organisms there, of course, is an entirely different matter. And that will have to await the arrival, back at Enceladus, of the spacecrafts, hopefully some time in the near future, specifically equipped to address that particular question. But in the meantime I invite you to imagine the day when we might journey to the Saturnine system, and visit the Enceladus interplanetary geyser park, just because we can. Thank you. #Planets #Astronomy #Exploration #Science #Space #Technology #Solar_System 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴Could a Saturn moon harbor life? #Planets #Astronomy #Exploration #Science #Space #Technology #Solar_System 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

There's been a lot of debate about whether challenge trials are too risky. I happen to think that those risks are worth taking. A challenge trial would only recruit young and healthy participants -- think between the ages of 20 and 29. Fewer than one percent of people in that age-group need to be taken to hospital after becoming infected with COVID-19. So it would likely be even lower in a challenge trial, because researchers check to make sure that participants have no preexisting conditions. The risk of a young healthy person dying of COVID-19 is around five thousandths of a percent. That means for every 100,000 20-year-olds who become infected with COVID-19, about five die. If I were to give birth in the United States, my risk of dying would be higher than that. Or you could choose to think about it this way. If my little sister needed a kidney, I wouldn't hesitate for a moment before I offered her mine. And if I can take on that risk to benefit a loved one, it makes sense to allow people to take on a similar risk to speed up the development of a vaccine that would benefit not just their loved ones, but everyone around them as well. There's a lot we still don't know, especially about the long-term effects of COVID-19 infection. I volunteered despite that uncertainty because like many of you, I feel frustrated knowing that hundreds of thousands of people are dying. And that's without mentioning the millions more who are struggling as measures to stop the spread take a toll on their physical, emotional and mental well-being. It turns out I'm not alone in feeling this way. Since May, over 39,000 people from across the world have volunteered to participate in potential COVID-19 challenge trials through a nonprofit I helped found called 1Day Sooner. We advocate for challenge trial participants and have been encouraging stakeholders to begin preparing for these trials. As early as May, when challenge trials were still being considered for their role in the fight against COVID-19, the World Health Organization cited 1Day Sooner as an example of the kind of public engagement needed to run a challenge trial. In mid-October, the UK government formally announced their intention to conduct a challenge trial at the beginning of 2021. It is clear that the COVID-19 pandemic is a global crisis. It has inspired record-shattering innovation, and it has highlighted the heroic acts of many frontline workers, but is has also taken a catastrophic toll. The arrival of each new vaccine brings us one step closer to rebuilding. But the true global solution lies in those vaccines being in the hands of people all over the world. Challenge trials could be a part of that solution. Thank you. #Coronavirus #Virus #Science #Vaccines #Medicine #Health #Pandemic #Disease 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴How COVID 19 human challenge trials work and why I volunteered? In April 2020, I made what many perceive as a risky decision. I volunteered to be deliberately infected with COVID-19. This infection would be part of what is called a human challenge trial, where young, healthy people are given a vaccine and are deliberately exposed to the virus that causes COVID-19. These trials help researchers figure out more quickly if a vaccine is working. I think this research is crucial, because today, I'm going to speak to you for six minutes. In that time, roughly 1,250 people will be confirmed infected with COVID-19. Twenty-one people will die. And then this pattern will repeat hour after hour and day by day, until we're able to vaccinate most of the eight billion people affected by this global crisis. Scientists have been working around the clock to make those vaccines a reality. But what should we do when the human cost of waiting for those vaccines is rising by the day? This is where human challenge trials come in. They're different from the traditional phase three vaccine trials taking place now, where people are given a vaccine or placebo and asked to go about their everyday lives. Here, researchers have to wait to see how many people in each group become infected. Until enough of them get sick, we don't have enough data to know whether a vaccine is working. Finding an effective vaccine with this method can take months or sometimes years, and it requires thousands of volunteers. A challenge trial works faster because researchers control exposure, instead of waiting for people to get sick. So instead of a year, we could know in as little as a month whether a vaccine seems effective. Instead of thousands of volunteers, a challenge trial relies on just 50 to 100. Because we know for certain when people are exposed and develop disease, these trials also allow us to gather data about the early stages of infection and our immune response. This data is impossible to gather in any other way, especially for people who become infected but never show symptoms. This knowledge is important for designing policies that limit COVID-19 transmission. The time saved translates into precious months' head start on manufacturing, getting us more working COVID-19 vaccines faster. These trials are useful -- even though recent phase three results sound encouraging. The arrival of the first vaccine is going to be a monumental breakthrough. It just isn't quite the fairytale ending we're all hoping for. We're going to need multiple vaccines, because we just don't have the infrastructure needed to immunize all eight billion people on the planet with just one kind. Each type of vaccine requires its own special process and equipment to make, store and deliver it. If we had multiple working COVID-19 vaccines, we could make use of all of our equipment at the same time. Some of the leading candidates need to be kept extremely cold before they are delivered to people. This can be really hard, especially in countries where there isn't reliable electricity or a secure method to store them. Scientists have been using human challenge trials for hundreds of years. They've sped up the development of vaccines against typhoid and cholera, and they've helped us better understand how immunity develops to things like the flu, malaria and dengue. We've even used them for other types of coronavirus before.

🔴How COVID 19 human challenge trials work and why I volunteered? #Coronavirus #Virus #Science #Vaccines #Medicine #Health #Pandemic #Disease 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

This is how the Internet works. This is that great big secret. The Internet provides a level playing field. Your link is as good as your link, which is as good as my link. With a browser, anyone can get to any website no matter your budget. That is, as long as you can keep net neutrality in place. Another important thing is it costs nothing to get content online. There are so many publishing tools available, it only takes a few minutes to produce something. and the cost of iteration is so cheap, you might as well. If you do, be genuine. Be honest, up-front. One of the great lessons Greenpeace learned is that it's OK to lose control, OK to take yourself a little less seriously, given that, even though it's a very serious cause, you could ultimately achieve your goal. That's the final message I want to share: you can do well online. But no longer is the message coming from just the top down. If you want to succeed you've got to be OK to lose control. Thank you. #Internet #Animals #Business #Culture #Entertainment #Entrepreneur #Ocean 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴How to make a splash in social media? There are a lot of web 2.0 consultants who make a lot of money. In fact, they make their living on this stuff. I'm going to try to save you all the time and money and go through it in the next three minutes, so bear with me. Started a website in 2005 with a few friends, called Reddit.com. It's what you'd call a social news website; basically, the democratic front page of the best stuff on the web. You find some interesting content -- say, a TED Talk -- submit it to Reddit, and a community of your peers votes up if they like it, down if they don't. That creates the front page. It's always rising, falling; a half million people visit every day. But this isn't about Reddit. It's about discovering new things that pop up on the web. In the last four years, we've seen all kinds of memes, all kinds of trends get born right on our front page. This isn't about Reddit itself, it's actually about humpback whales. Well, technically, it's about Greenpeace, an environmental organization that wanted to stop the Japanese government's whaling campaign. The whales were getting killed; they wanted to put an end to it. One of the ways they wanted to do it was to put a tracking chip inside one of the whales. But to personify the movement, they wanted to name it. So in true web fashion, they put together a poll, where they had a bunch of very erudite, very thoughtful, cultured names. I believe this is the Farsi word for "immortal." I think this means "divine power of the ocean" in a Polynesian language. And then there was this: "Mister Splashy Pants." And this was a special name. Mister Pants, or "Splashy" to his friends, was very popular on the Internet. In fact, someone on Reddit thought, "What a great thing, we should all vote this up." And Redditors responded and all agreed. So the voting started. We got behind it ourselves; we changed our logo for the day, from the alien to Splashy, to help the cause. And it wasn't long before other sites like Fark and Boing Boing and the rest of the Internet started saying, "We love Splashy Pants!" So it went from about five percent, which was when this meme started, to 70 percent at the end of voting. Pretty impressive, right? We won! Mister Splashy Pants was chosen. Just kidding -- Greenpeace actually wasn't that crazy about it, because they wanted one of the more thoughtful names to win. They said, "No, just kidding. We'll give it another week of voting." Well, that got us a little angry, so we changed it to Fightin' Splashy. And the Reddit community -- really, the rest of the Internet, really got behind this. Facebook groups were created. Facebook applications were created. The idea was, "Vote your conscience, vote for Mister Splashy Pants." People were putting up signs in the real world about this whale. This was the final vote: 78 percent of the votes. To give you an idea of the landslide, the next highest name pulled in three. There was a clear lesson: the Internet loves Mister Splashy Pants. Which is obvious. It's a great name. Everyone wants to hear their news anchor say, "Mister Splashy Pants." I think that's what helped drive this. What was cool were the repercussions. Greenpeace created an entire marketing campaign around it -- Mister Splashy Pants shirts and pins, an e-card so you could send your friend a dancing Splashy. But even more important was that they accomplished their mission. The Japanese government called off their whaling expedition. Mission accomplished: Greenpeace was thrilled, the whales were happy -- that's a quote. And actually, Redditors in the Internet community were happy to participate, but they weren't whale lovers. A few, certainly, but we're talking about a lot of people, really interested and caught up in this meme. Greenpeace came back to the site and thanked Reddit for its participation. But this wasn't really altruism; just interest in doing something cool.

🔴How to make a splash in social media? #Internet #Animals #Business #Culture #Entertainment #Entrepreneur #Ocean 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴How to be an upstander instead of a bystander? Let me tell you a story, where you'll meet the characters who I'll call Bilal and Brenda. I was working in a most remarkable part of the world. And one unremarkable morning, a colleague came to see me. She told me that Bilal, one of our senior executives, had been telling everyone I was being removed because I'd been messing with the wrong people. And now, I was going to face the consequences. I wasn't alarmed, because I knew I had done what I'd been hired to do: my job, dealing with thorny issues head on and leaving no stone unturned. In fact, in the months prior to this, we'd overturned more than just a few stones. Those details are for another time. I called my husband, James, to tell him about this bizarre conversation, and with what proved to be great foresight, he said, "Angélique, pack your things and call Brenda, in that order." I called Brenda. I'd worked with her for a number of years, and I trusted her. She was the person who'd recommended me for that job. I cut to the chase, because my husband's reaction made me realize this was more than just the usual stuff I'd encountered before. And I say usual, but in that moment of clarity, it dawned on me what James had already recognized: none of this was usual. These irregularities, part of a pattern I'd failed to notice, were what I now know as open secrets living beneath those proverbial stones I'd had the audacity to overturn. To my shock, I learned that this was happening because I hadn't tried hard enough to operate in the "gray space." I didn't seem to know when to kick things into the long grass. And I didn't understand that this was how the system worked. The message, the implied threat, was clear. Over the next few weeks, I was replaced by a convenient yes-man while I was still there. I suffered from terrible gastritis, and I pretended to our two young daughters that I still had that job. Leaving home every morning, dressed up as if for work, to drop them to school, for six months. I did not submit, but I won't pretend that it was easy to speak up or beneficial in any way to me, to my family or to my career. When we speak up in the workplace despite policies to the contrary, whilst we may not lose our jobs, we are likely to lose the camaraderie of our coworkers. Disbelieved, ostracized, faced with under-the-radar bullying. You know the kind when you walk into a room and everyone stops talking? We think: It's not my responsibility to say anything. So why did I choose to act despite the risks to my family and to me? The sin of omission is a failure to do what you know is right. When you stay quiet, even though you're not guilty of wrongdoing yourself, what will you have to live with if you don't take action? So who are you in this lineup of actors? The bad actor, the wrongdoer? The bad stander who benefits directly or indirectly and acts as a puppet for the bad actor? The bystander, aware of the open secrets but not actually doing anything wrong or the upstander? This is the person we want to see when we look in the mirror. I've learned three things: One, don't second guess yourself. When you see something amiss, ask questions, because it is okay to challenge those in authority. Two, don't be complicit. You always have the power to say no in the face of wrongdoing. And three, be an upstander. Speaking up is not about being brave. It's not about not feeling scared. But when you do what you know is right, you can be at peace with yourself. Yes, it is hard to say what you feel in the moment. Do it anyway. Be fearless. Martin Luther King said, "In the end, we will remember not the words of our enemies, but the silence of our friends." So when you look in the mirror, who will you see? A bystander, keeper of open secrets? Or will the person looking back at you be an upstander? I know who I see. I know who my daughters see. The choice is yours. #Social_Change #Self #Work #Bullying #Corruption #Ethics 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴How to be an upstander instead of a bystander? #Social_Change #Self #Work #Bullying #Corruption #Ethics 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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The third and final trick that I use to assess a founder's adaptability is to look for people who infuse exploration into their life and their business. There's a sort of natural tension between exploration and exploitation. And collectively, all of us tend to overvalue exploitation. Here's what I mean. In the year 2000, a man finagled his way into a meeting with John Antioco, the CEO of Blockbuster, and proposed a partnership to manage Blockbuster's fledgling online business. The CEO John laughed him out of the room, saying, "I have millions of existing customers and thousands of successful retail stores. I really need to focus on the money." The other man in the meeting, however, turned out to be Reed Hastings, the CEO of Netflix. In 2018, Netflix brought in 15.8 billion dollars, while Blockbuster filed for bankruptcy in 2010, directly 10 years after that meeting. The Blockbuster CEO was too focused on exploiting his already successful business model, so much so that he couldn't see around the next corner. In that way, his previous success became the enemy of his adaptability potential. For the founders that I work with, I frame exploration as a state of constant seeking. To never fall too far in love with your wins but rather continue to proactively seek out what might kill you next. When I first started exploring adaptability, the thing I found most exciting is that we can improve it. Each of us has the capacity to become more adaptable. But think of it like a muscle: it's got to be exercised. And don't get discouraged if it takes a while. Remember Destin Sandlin? It took him eight months just to learn how to ride a bike. Over time, using the tricks that I use on founders -- asking "what if" questions, actively unlearning and prioritizing exploration over exploitation can put you in the driver's seat -- so that the next time something big changes, you're already prepared. We're entering a future where IQ and EQ both matter way less than how fast you're able to adapt. So I hope that these tools help you to raise your own AQ. Thank you. #Leadership #Business #Entrepreneur #Personal_Growth #Investing 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴3 ways to measure your adaptability and how to improve it I met 273 start-up founders last year. And each one was looking for money. As a tech investor, my goal was to sort through everyone that I met and make a quick determination about which ones had the potential to make something really big. But what makes a great founder? This is a question I ask myself daily. Some venture capitalists place bets based on a founder's previous background. Did they go to an Ivy League school? Have they worked at a blue-chip company? Have they built out a big vision before? Effectively, how smart is this person? Other VCs asses a founder's emotional quotient, or EQ. How well will this person build teams and build rapport across customers and clients? I have a different methodology to assess start-up founders, though, and it's not complicated. I look for signs of one specific trait. Not IQ, not EQ. It's adaptability: how well a person reacts to the inevitability of change, and lots of it. That's the single most important determinant for me. I subscribe to the belief that adaptability itself is a form of intelligence, and our adaptability quotient, or AQ, is something that can be measured, tested and improved. AQ isn't just useful for start-up founders, however. I think it's increasingly important for all of us. Because the world is speeding up. We know that the rate of technological change is accelerating, which is forcing our brains to react. Whether you're navigating changing job conditions brought on by automation, shifting geopolitics in a more globalized world, or simply changing family dynamics and personal relationships. Each of us, as individuals, groups, corporations and even governments are being forced to grapple with more change than ever before in human history. So, how do we assess our adaptability? I use three tricks when meeting with founders. Here's the first. Think back to your most recent job interview. What kind of questions were you asked? Probably some variation of, "Tell me about a time when," right? Instead, to interview for adaptability, I like to ask "what if" questions. What if your main revenue stream were to dry up overnight? What if a heat wave prevented every single customer from being able to visit your store? Asking "what if," instead of asking about the past, forces the brain to simulate. To picture multiple possible versions of the future. The strength of that vision, as well as how many distinct scenarios someone can conjure, tells me a lot. Practicing simulations is a sort of safe testing ground for improving adaptability. Instead of testing how you take in and retain information, like an IQ test might, it tests how you manipulate information, given a constraint, in order to achieve a specific goal. The second trick that I use to assess adaptability in founders is to look for signs of unlearning. Active unlearners seek to challenge what they presume to already know, and instead, override that data with new information. Kind of like a computer running a disk cleanup. Take the example of Destin Sandlin, who programed his bicycle to turn left when he steered it right and vice versa. He called this his Backwards Brain Bike, and it took him nearly eight months just to learn how to ride it kind of, sort of normally. The fact that Destin was able to unlearn his regular bike in favor of a new one, though, signals something awesome about our adaptability. It's not fixed. Instead, each of us has the capacity to improve it, through dedication and hard work. On the last page of Gandhi's autobiography, he wrote, "I must reduce myself to zero." At many points in his very full life, he was still seeking to return to a beginner's mindset, to zero. To unlearn. In this way, I think it's pretty safe to say Gandhi had a high AQ score.

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One of the reasons NEOWISE is so valuable is that it sees the sky in the thermal infrared. That means that instead of seeing the sunlight that asteroids reflect, NEOWISE sees the heat that they emit. This is a vital capability since some asteroids are as dark as coal and can be difficult or impossible to spot with other telescopes. But all asteroids, light or dark, shine brightly for NEOWISE. Astronomers are using every technique at their disposal to discover and study asteroids. In 2010, a historic milestone was reached. The community, together, discovered over 90 percent of asteroids bigger than one kilometer across -- objects capable of massive destruction to Earth. But the job's not done yet. An object 140 meters or bigger could decimate a medium-sized country. So far, we've only found 25 percent of those. We must keep searching the sky for near-Earth asteroids. We are the only species able to understand calculus or build telescopes. We know how to find these objects. This is our responsibility. If we found a hazardous asteroid with significant early warning, we could nudge it out of the way. Unlike earthquakes, hurricanes or volcanic eruptions, an asteroid impact can be precisely predicted and prevented. What we need to do now is map near-Earth space. We must keep searching the sky. Thank you. #Astronomy #Asteroid #Discovery #Exploration #Collaboration #Global_Issues #Nature #Physics #Science #Technology #Solar_System #TED_Fellows #Universe #Space #TED_Books 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴Adventures of an asteroid hunter I am holding something remarkably old. It is older than any human artifact, older than life on Earth, older than the continents and the oceans between them. This was formed over four billion years ago in the earliest days of the solar system while the planets were still forming. This rusty lump of nickel and iron may not appear special, but when it is cut open ... you can see that it is different from earthly metals. This pattern reveals metallic crystals that can only form out in space where molten metal can cool extremely slowly, a few degrees every million years. This was once part of a much larger object, one of millions left over after the planets formed. We call these objects asteroids. Asteroids are our oldest and most numerous cosmic neighbors. This graphic shows near-Earth asteroids orbiting around the Sun, shown in yellow, and swinging close to the Earth's orbit, shown in blue. The sizes of the Earth, Sun and asteroids have been greatly exaggerated so you can see them clearly. Teams of scientists across the globe are searching for these objects, discovering new ones every day, steadily mapping near-Earth space. Much of this work is funded by NASA. I think of the search for these asteroids as a giant public works project, but instead of building a highway, we're charting outer space, building an archive that will last for generations. These are the 1,556 near-Earth asteroids discovered just last year. And these are all of the known near-Earth asteroids, which at last count was 13,733. Each one has been imaged, cataloged and had its path around the Sun determined. Although it varies from asteroid to asteroid, the paths of most asteroids can be predicted for dozens of years. And the paths of some asteroids can be predicted with incredible precision. For example, scientists at the Jet Propulsion Laboratory predicted where the asteroid Toutatis was going to be four years in advance to within 30 kilometers. In those four years, Toutatis traveled 8.5 billion kilometers. That's a fractional precision of 0.000000004. Now, the reason I have this beautiful asteroid fragment is because, like all neighbors, asteroids sometimes drop by unexpectedly. Three years ago today, a small asteroid exploded over the city of Chelyabinsk, Russia. That object was about 19 meters across, or about as big as a convenience store. Objects of this size hit the Earth every 50 years or so. 66 million years ago, a much larger object hit the Earth, causing a massive extinction. 75 percent of plant and animal species were lost, including, sadly, the dinosaurs. That object was about 10 kilometers across, and 10 kilometers is roughly the cruising altitude of a 747 jet. So the next time you're in an airplane, snag a window seat, look out and imagine a rock so enormous that resting on the ground, it just grazes your wingtip. It's so wide that it takes your plane one full minute to fly past it. That's the size of the asteroid that hit the Earth. It has only been within my lifetime that asteroids have been considered a credible threat to our planet. And since then, there's been a focused effort underway to discover and catalog these objects. I am lucky enough to be part of this effort. I'm part of a team of scientists that use NASA's NEOWISE telescope. Now, NEOWISE was not designed to find asteroids. It was designed to orbit the earth and look far beyond our solar system to seek out the coldest stars and the most luminous galaxies. And it did that very well for its designed lifetime of seven months. But today, six years later, it's still going. We've repurposed it to discover and study asteroids. And although it's a wonderful little space robot, these days it's kind of like a used car. The cryogen that used to refrigerate its sensors is long gone, so we joke that its air-conditioning is broken. It's got 920 million miles on the odometer, but it still runs great and reliably takes a photograph of the sky every 11 seconds. It's taken 23 photos since I began speaking to you.

🔴Adventures of an asteroid hunter #Astronomy #Asteroid #Discovery #Exploration #Collaboration #Global_Issues #Nature #Physics #Science #Technology #Solar_System #TED_Fellows #Universe #Space #TED_Books 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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