TED Talks - آموزش زبان
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🔴A brief history of Spanish

Beginning in the 3rd century, before the coming era, the Romans conquered the Iberian Peninsula. This period gave rise to several regional languages in the area that's now Spain, including Castilian, Catalan and Galician. One of these would become Spanish— but not for another 1,500 years. Those years tell the origin story of what’s become a global modern language.
During the Roman occupation, colloquial spoken Latin, often called “Vulgar Latin,” mixed with Indigenous languages. Approximately 75% of modern Spanish comes from Latin, including syntactic rules. For instance, verbs are conjugated in a similar way as in Latin. And like other Roman languages, nouns have gender: el sol, the sun, is masculine, whereas la luna, the moon, is feminine.
After the Roman Empire collapsed, a series of other powers conquered the region. First came the Visigoths starting in the 5th century of the common era. They spoke an eastern Germanic language that would eventually become part of German and lent a few words to the language that would become Spanish. Then the Umayyad Caliphate ousted the Visigoths. They spoke Arabic, which left a strong mark on modern Spanish: over a thousand words come from Arabic. These often have a starting “a” or “z” sound, and sometimes include an “h.”
In 1492, the Catholic Church consolidated its power through two monarchs, Isabella and Ferdinand, expelling Muslims and Jews, combining the distinct regional kingdoms into one nation, and adopting one of the local languages as the official state language. That language was Castellano, or Castilian, from the Kingdom of Castile, which was centrally located in Spain and home to Madrid. Thereafter Castellano became Español, or Spanish.
But the Spanish of 1492 was Old Spanish, very different from Spanish today. That same year, Christopher Columbus sailed across the Atlantic Ocean, marking the start of the Spanish conquest of the Americas. The Indigenous population of the Americas spoke an estimated 2,000 different languages. Over the next few decades, most of them were forced to adopt Spanish at the expense of their own languages. Still, words from Indigenous languages became part of Spanish. From Nahuatl, the language of the Aztec Empire, came words with “ch” and “y” like “chapulin” and “coyote.” From Quechua, a language spoken in the Peruvian Andes, came words with “ch” like “cancha,” “chullo,” and “poncho.” Some of these words describe things that hadn’t existed in the Spanish lexicon before, while others replaced existing Spanish words even in Spain.
By the time Miguel de Cervantes published the first part of “Don Quixote” in 1605, the language was arguably more similar to modern Spanish than plays of one of his contemporaries, William Shakespeare, were to modern English. Starting in the 18th century, French language and culture were extremely fashionable in Spain, and later Hispanic America. While the two languages already had commonalities from their shared roots in Latin, Spanish gained new words from French during this period.
In the 19th century, all over Central and South America, people revolted to gain independence from Spain. In the newly sovereign nations, people continued to speak the language of their former oppressors. Today, there are approximately 415 million inhabitants of Hispanic America. Spanish is the official language of 21 countries and Puerto Rico. As of 2021, only English, Mandarin, and Hindi have more speakers.
How does a language with so many speakers around the world not break apart into new languages the way Vulgar Latin did? There's no easy answer to this question. Other languages that spread through colonialism, like French, have mixed with Indigenous languages to form entirely new ones. Some would argue that Spanglish, a mixture of Spanish and English, is a distinct language or on its way to becoming one. But although a person in Buenos Aires occasionally might use words that aren’t fully intelligible to someone in Bogotá or Mexico City, Spanish retains enough unity of syntax, grammar, and vocabulary to remain one language.

#Culture #Education #History #Language #TED_Ed #Animation

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🔴How innovation and technology can fight global hunger?

#Global_Issues #Technology #Business #Innovation #Humanity

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🔴How innovation and technology can fight global hunger?

When you think about innovation and technology, you're most likely thinking about the latest app on your smartphone, or maybe you think about rockets going into space. But what about some of the world's biggest challenges, like global hunger or climate change? They can seem overwhelming or, you know, maybe you just think there should be a nonprofit organization that takes care of that. But why is it that we think so traditionally about some of the world's biggest challenges?
I believe innovation and technology can help tackle some of the world's biggest challenges. The barrier is our own thinking. And there's something about this where big global challenges are no different than big global business challenges. So let's change that.
Let's talk about one of those topics, global hunger. Hunger may seem like a remote problem for you, but the effects of it are pretty drastic. Hunger means you do not have enough calories on a daily basis to live a healthy life. And there is up to 811 million people on the planet who are hungry. So what can we do about it?
I think innovation and technology is the answer. A couple of years ago, a friend and I realized that United Nations World Food Programme can feed a child for a full day for only 80 cents. We were shocked. We thought, if more people knew about this, if we made it easy, imagine you were having dinner with your friends and you're enjoying yourselves, wouldn't you want to share your meal with a child in need? And that's exactly why we founded an app called Share the Meal. It's so simple. With one tap on your smartphone, you can share your meal with a child in need for only 80 cents.
And I'm excited to tell you it's working. Over 130 million meals have been shared so far by six million app users across the globe. And Share the Meal was even an app of the year in 2020 by both Apple and Google.
When we started Share the Meal, we had to push really hard to make it a reality. There just weren't so many support mechanisms out there to support social entrepreneurs, when you compare it, for instance, with the number of start-up accelerators for for-profit ventures. Coming from that inspiration, I got the opportunity to start the World Food Programme’s Innovation Accelerator, exactly with the goal of replicating what Silicon Valley does well, but for global social impact. It's a start-up accelerator that supports start-ups and nonprofit innovations globally and helps them scale to disrupt global hunger.
So let's look at two of those examples. The first one is about blockchain. Now, when you think about blockchain, you may think about Bitcoin or cryptocurrencies, but that's not how we think of it. We use blockchain technology so that refugees can go into stores and purchase food. It's an innovation called Building Blocks. And why blockchain? Blockchain helps because it's not my blockchain or your blockchain, it's the neutral blockchain network. And that way it makes collaboration among aid organizations much easier. And how does it work? Every month, aid organizations transfer money to individual blockchain accounts, and then that individual can go into a store, shop for the groceries and at the checkout they pay with the iris scan or with another authentication method. That innovation had first been submitted to us by a World Food Programme finance officer who participated in our innovation boot camp. He then developed a prototype and tested it only two months after starting, in Pakistan with about 100 people, and the next pilot was already with 10,000 refugees in Jordan. And that was so successful, that that solution scaled to over 100,000 people within seven months. And right now, Building Blocks is reaching about one million people, transferring over 300 million dollars of cash to people in urgent need of food.
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And here's another example. Did you know that corn flakes and a lot of other cereals have added vitamins and minerals? That's called food fortification, when you add critical nutrients to staple foods we eat every day. That's particularly important when people do not have access to a healthy diet or maybe they cannot afford it. This is where social business called Sanku comes in. Sanku has developed an internet-enabled machine that fortifies maize flour at small mills in Africa. Now they have a market-based model that helps provide fortified, nutritious flour to their clients of the small mills at no additional cost. Right now it's reaching up to three million people and scaling further.
So, does it work? Can accelerated innovation and technology help us tackle some of the world's biggest challenges? When we first started the World Food Programme Innovation Accelerator, it seemed like a crazy idea that innovation and technology can help us make a meaningful impact on global hunger. But since starting in 2015, we've consistently doubled the number of people reached every year through the innovations that we've supported. In 2021, we've positively impacted the lives of 8.6 million people already. And now we even run accelerator programs for other global problems like primary health care, vaccine delivery or gender equality.
Imagine what the impact could be if you take action today as an individual, as a company, or maybe as a start-up founder. Innovation and technology can enable so much good in the world, and together we can solve the world's biggest challenges.
Thank you.

#Global_Issues #Technology #Business #Innovation #Humanity

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🔴Would you pass the wallet test?

Picture this: you’re working a slow shift in a hotel lobby when someone hurriedly approaches the front desk. They found a lost wallet around the corner, but they’re in a rush and don’t have time to follow up. They ask if you can handle it and then run off. Looking at the wallet you see it contains a key, a grocery list, about $13, and three business cards with a name and email you assume belong to the wallet’s owner. So, what do you do?
Between 2013 and 2016, over 17,000 front-desk workers around the globe were faced with this choice, becoming unwitting participants in a massive study of honesty. And the results surprised top economists and the researchers running the experiment. But to understand what these groups were expecting, we need to spend a little time defining honesty.
We typically think of honesty in terms of actively telling the truth in our interpersonal relationships. But in fact, every healthy society relies on a shared foundation of honesty. Using public services, making business transactions, and deciding government policies requires a baseline expectation of honesty from our fellow citizens. Because of this, understanding what drives honesty is a vital research subject for economists, psychologists, and sociologists. Unfortunately, honesty can be difficult to investigate when people know they’re being watched. So, researchers have come up with clever ways to analyze this behavior outside the lab. And this global study by the universities of Michigan, Utah, and Zurich sought to answer an important question: will people engage in opportunistic behavior when there’s little-to-no chance of being caught?
In what became known as the Lost Wallet Test, 13 research assistants traveled to 355 cities in 40 different countries, recreating the same scenario in hotels, banks, public offices, and various cultural establishments. The clear wallets ensured participants could see their contents, half of which contained a key, grocery list, and business cards, while the other half also included the equivalent of roughly 13 US dollars. The researchers believed the money would discourage honesty. Specifically, they thought participants’ self-interest would overpower two competing factors: their altruistic desire not to harm the wallet’s owner, and their desire to maintain a positive self-image. Regarding self-image, we generally like to think of ourselves as good and honest. But studies have found people are often able to let themselves off the hook for stealing small amounts of money. As for harming the wallet's owner, the victim of their crime would be abstract. They'd never met this person, and since the wallet had come from another location, it seemed unlikely they ever would.
For these reasons, researchers expected money-filled wallets to be reported less often, and the 279 economists they surveyed agreed. But to their surprise, the study found the exact opposite. While only 46% of cash-free wallets were reported, 61% of cash wallets were called in. This pattern held true across the globe, regardless of the participants’ age, gender, or whether they were being observed during the wallet drop-off. And when researchers tried increasing the temptation to be dishonest with wallets containing nearly $100, the results surprised them again. People reported 72% of these big money wallets.
There are a lot of theories for why honesty goes up as the wallet becomes more valuable. The $100 wallet certainly increases self-interest. But in international follow-up surveys, people reported that taking larger sums of money felt more like theft, making it harder to maintain a positive self-image. It’s also possible that when the financial stakes are higher, so is the perceived harm to the wallet’s owner. Others have suggested that our commitment to honesty could be altered in professional settings, meaning participants might have acted differently outside the office.
Still, this result suggests that self-interest might not be as powerful as we often think. Seeing yourself as an honest person can motivate you to be an honest person. And by modeling this behavior and celebrating it and others, we can help create an honest society we can all rely on.

#Science #Education #Decision_Making #Self #Humanity #Money #TED_Ed #Animation #Ethics

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🔴The most powerful yet overlooked resource in schools

I'm eight years old, and it's my first day at the new school, but I cannot express myself. Actually, I don't understand a single word of English. My family just moved from Korea to England. My mom is raising my little sister and me, and she's also finishing her degree. She's nearly as lost as I am, but with the little English she knows, she speaks to my teachers in broken English, every day, about how she can help me at home. Compared to many other parents in the school who speak no English at all or are even scared to ask the questions, she's much better-off. And for that, I'm much better-off.
Fast-forward three months. Every time my mom picks me up, a swarm of Korean parents crowd around the car. It causes a traffic jam, like, every day. Seriously?
All the other Korean parents gather around the car, asking my mom the same questions that she asked my teachers. "What is a parent-teacher conference again?" "My kid is behind. What can I do?" I don't know how I'd have survived that first year without my mom. But I do know that my experience is not that unique.
Every year, 50 million children go through the US school system. And out of that, 40 million, that is, four out of five children, come from underserved or immigrant families. We're talking about the vast majority of the system here. I realize that I'm one of the lucky ones, because the law of averages will tell you that these children are likely to fall behind by two whole school years. This costs the US economy almost one trillion dollars every year.
But it doesn't have to be that way. In fact, research says that for a student to do well, a family's engagement is more important than that family's wealth.
A parent is a child's first teacher, and children spend 80 percent of their waking hours outside the classroom. So no wonder families are the game changer. So here’s a trillion-dollar question: How can we better tap into the incredible potential of families and their universal love for their children?
This is why the organization I founded helps teachers, families and schools connect using something that we all have: a mobile phone. Teachers write the communication in English, and parents receive it in their own languages, and vice versa. We break down the language barrier, bridge cultural and knowledge differences by explaining education concepts and enable and prompt parents and teachers to talk to each other. We're playing the role that my mom played for the school and my friends’ families: the communicator, the translator, the coach, the explainer and the go-between. And since my mom cannot be everywhere -- and, in fact, no parent can, and that is not for the lack of trying -- we've stepped in and connected four million families, and students and educators in 70,000 schools to date.
When families and schools work together, everyone wins. Students are supported, families are empowered, and teachers' jobs just become that much easier. The school environment and community thrives with people from all backgrounds. Even the system itself benefits. Last year, the US spent nearly 700 billion dollars on school-aged education. So imagine if you can increase the return on that investment, even just a little bit, by connecting schools to engage with all families.
And we should. It's literally a no-brainer. But actually, there's something much bigger here than student grades. Education goes beyond economic growth, and our goal goes beyond the classroom. Schools are a funnel to the real world. Public education makes citizens. And in creating the next generation of citizens, we cannot be leaving behind four out of five children or their families. If we continue to pick and choose who the system engages with generation after generation, like we do now, we will not be left with a community, a civil society or even a functioning democracy. Our collective well-being starts with inclusive schools and helping every child realize their endless potential.
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So our hope is that one day, all underserved and immigrant children and their families will feel that they belong in the education system. Our dream is that one day, they'll feel included in the very communities that they're expected to build.
Thank you.

#Technology #Education #Innovation #Love #Communication #Parenting #Language #Family #Teaching

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🔴What's normal anxiety -- and what's an anxiety disorder?

We live in a culture that doesn't take mental health issues seriously. There's a lot of stigma. Some people tell you to just suck it up, or get it together, or to stop worrying, or that it's all in your head. But I'm here to tell you that anxiety disorders, they're as real as diabetes.
Hi again. It's Dr. Jen, and I've noticed something with my patients. They often describe to me some classic symptoms of an anxiety disorder. Constant worry, trouble sleeping, tense muscles and struggle with concentrating. But they aren't getting treatment.
There's a lot of issues with mental-health care in this country. Some people don't have insurance that would cover it. Some have been dismissed or minimized in the past, and don't think seeking help will do any good. Some worry about the stigma and whether it could affect future jobs or relationships. But severe anxiety isn't a moral or personal failing. It's a health problem, just like strep throat or diabetes. It needs to be treated with the same kind of seriousness.
Before we can talk about anxiety disorders, let's talk about anxiety itself. Anxiety is the very real and normal emotion we feel in a stressful situation. It's related to fear. But while fear is a response to an immediate threat that quickly subsides, anxiety is a response to more uncertain threats that tends to last much longer. It's all part of the threat detection system, which all animals have to some degree, to help protect us from predators. Anxiety starts in the brain's amygdala, a pair of almond-sized nerve bundles that alert other areas of the brain to be ready for defensive action. Next, the hypothalamus relays the signal, setting off what we call the stress response in our body. Our muscles tense, our breathing and heart rate increase and our blood pressure rises. Areas in the brain stem kick in and put you in a state of high alertness. This is the fight-or-flight response.
There are ways the fight-or-flight response is kept somewhat in check, with an area of higher-level thinking called the ventromedial prefrontal cortex. It works like this. If a person sees something they think is dangerous, like a tiger, that sends a signal to the amygdala, saying "it's time to run." The ventromedial prefrontal cortex can say to the amygdala, "Hey, look. The tiger's in a cage. You know what a cage is? They can't escape from a cage. It's OK to calm down." It's a feedback loop that can help keep the response in check. The hippocampus is also involved. It provides context, saying things like, "Hey, we've seen tigers in cages before. We're in a zoo. You are extra safe."
With anxiety, these threat-detection systems and mechanisms that reduce or inhibit them are functioning incorrectly and cause us to worry about the future and our safety in it. But for many people, it goes into overdrive. They experience persistent pervasive anxiety that disrupts work, school and relationships and leads them to avoid situations that may trigger symptoms. Anxiety disorders are not at all uncommon. Based on data from the World Mental Health Survey, researchers estimate that about 16 percent of individuals currently have or have had an anxiety disorder. These include social anxiety disorder, panic disorder, agoraphobia and phobias. Studies have shown that people with anxiety disorders don't just have a different way of reacting to stress. There may be actual differences in how their brain is working.
One model describes possible mix-ups in the connections between the amygdala and other parts of the brain. The pathways that signal anxiety become stronger. And the more anxiety you have, the stronger the pathways become, and it becomes a vicious cycle.
The good news is there's treatment for anxiety, and that you don't have to suffer. Remember, this isn't about weakness. It's about changing brain patterns, and research shows that our brains have the ability to reorganize and form new connections all throughout our lives. A good first step is to do the basics. Eat a balanced diet, exercise regularly and get plenty of sleep, as your mind is part of your body. It might also help to try meditation. Instead of our heart rate rising and our body tensing, with mindfulness and breathing, we can slow down the fight-or-flight response and improve how we feel in the moment. Cognitive behavioral therapy, a form of talk therapy, can also be fantastic. In it, you learn to identify upsetting thoughts and determine whether they're realistic. Over time, cognitive behavioral therapy can rebuild those neural pathways that tamp down the anxiety response. Medication can also give relief, in both the short-term and the long-term. In the short-term, anti-anxiety drugs can down-regulate the threat-detection mechanisms that are going into overdrive. Studies have shown that both long-term medications and cognitive behavioral therapy can reduce that overreactivity of the amygdala we see an anxiety disorders.
High blood pressure and diabetes, they can be treated or managed over time. And the same is true for an anxiety disorder too.

#Psychology #Biology #Brain #Mental_Health #Neuroscience #Human_Body

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🔴The benefits of daydreaming

On a daily basis, you spend between a third and half your waking hours daydreaming. That may sound like a huge waste of time, but scientists think it must have some purpose, or humans wouldn’t have evolved to do so much of it. So to figure out what's going on here, let’s take a closer look at the mind-wanderer in chief: the bored teenager.
Wouldn’t it be cool to discover something, anything. Like even this plant. Just to be one of those explorers who sails around drawing stuff for years on end and everyone thinks they’re a genius. But does anyone even do that anymore? Is there anything left to discover? And would I be tough enough to deal with the dysentery or scurvy or piranhas or whatever? I barely have the endurance to make it through track practice... but I will. Any day now, I’ll have the discipline to show up before sunrise and practice. I’ll win all my races. Winning will become so easy, I’ll pick up other events just for fun. And once I'm in the Olympics, they’ll have no choice but to crown me team captain, which I will graciously accept. And will I be nasty to the teammate who yelled at me? No. I’ll just calmly say, “hope you’re in a better mood.”
Okay. Yours and other people's daydreams might sound or feel something like that. Let's see what was going on. To see what parts of the brain are active when you’re doing a task, or thinking, or daydreaming, scientists use brain imaging techniques that show increased blood flow and energy expenditure in those areas.
These brain areas are active, working together and communicating with each other. Taken together, they're called the executive network. When your mind starts to wander, a different set of brain areas becomes active. These areas make up the default mode network. The name default mode makes it sound like nothing is going on. And in fact, for many years, scientists associated this pattern of activity with rest. But a closer look reveals that these are the brain areas involved when we revisit a memory, when we think about our plans and hopes, and yes, when our minds are wandering off on a wild daydream. The mind can wander to unproductive or distressing places and brood over negative past events, like an argument. It can also wander to neutral, everyday matters, like planning out the rest of one's afternoon. But where mind-wandering really gets interesting is when it crosses into the realm of free-moving associative thought that you aren’t consciously directing. This kind of mind-wandering is associated with increases in both ideas and positive emotions, and the evidence suggests that daydreaming can help people envision ways to reach their goals and navigate relationships and social situations.
Scientists think there may be two essential parts to this process: a generative phase of free-flowing ideas and spontaneous thoughts, courtesy of the default mode network, followed by a process of selecting, developing, and pursuing the best ideas from that generative burst, driven by logical thinking thanks to the executive network. A host of imaging studies suggest that these two networks working in sync is a crucial condition for creative thinking. Taken together, the evidence clearly suggests the logical realm of the executive network and the imaginative realm of the default mode network are closely related. And as you can see, the executive network is still playing a role when the default mode network is doing its thing during daydreaming.
In teenagers, the prefrontal cortex and other areas involved in executive function are still developing, but teens are perfectly capable of thinking through their problems and goals, especially when given space to do so on their own.

#Memory #Education #Evolution #Psychology #Brain #Decision_Making #TED_Ed #Animation #Kids

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🔴The affordable, 3D-printed bionics of the future

One in seven people around the world has some kind of disability. Being born without my right hand has defined who I am over the past 30 years. I was fortunate to grow [up] in the sacred valley of the Incas in Cusco, Peru, surrounded by people who weren't surprised to see me driving my bike or probably playing basketball. When I was seven, I remember being stunned after I watched "Star Wars: The Empire Strikes Back," when Luke's hand gets cut off, the same one I didn't have. But then, being twice as stunned when the medical robots fitted him with a prosthesis that could move and feel. From then on, no greater purpose lived in my mind, which was to have a prosthesis like Luke Skywalker.
This dream led me to study mechatronics engineering and access the Biomechanics and Applied Robotics Laboratory in Pontifical Catholic University of Peru, where, with a multidisciplinary team, we developed a myoelectric prosthesis for a long transradial amputation, being me, the pilot user. I was able to move each finger individually. And also we developed a way in which we get to pass the sensation from the fingertips into my forearm using haptic feedback system.
Since this was a research project, we had enough funding to buy stuff from abroad. So, for example, the motors you get to see here, were all brought [from] Switzerland. This is one of the main reasons why it will cost at least 40,000 dollars to make this prosthesis. But 40K is way too much, considering that four out of five people with upper limb amputation live in developing countries. Even the 25,000 dollars that cost a robotic prosthesis imported from abroad is way too much. In Peru, that is equivalent to work full time on a minimum wage for almost seven years, just to buy the prostheses. Never mind pay for your food or your house. It is often that people get injured while doing manual labor activities like farming or metal manufacturing. Getting back to work and having access to money demands a functional hand.
It took me time to realize what a huge privilege I had to study a career that would help fulfill my dreams. But actually, what was preventing me from developing a solution that was both affordable and functional. The very first step in order to reducing the cost was to reduce the number of motors because they were all imported and therefore expensive. So we get to arrange occupational focus groups with our amputee volunteers in order to identify which gestures they will use the most, and of those, how many we could perform using just a single motor. The answer was three: pinch, cylindrical and lateral. This also helps us to reduce the number of electromyography sensors, too, from an arrangement of eight, we passed just to one. In this way, between makes in mechanical and myoelectric prosthesis, the prices will be dramatically low.
But material prices matter to. And that's why we choose to 3D print our prosthesis using mainly plastic from recycled bottles. Like the prosthesis I am wearing right now.
In order to develop our prosthesis, the process will go like this. First, we'll use our 3D scan and our own parametrization software in order to take the measures of the amputated area and the other hand of the user. Then we'll recreate the entire set of fingers, the palm and the prosthesis socket in our computational model to finally 3D print each of those parts. So far in LAT Bionics, we have two types of prosthesis. Maki, which is a mechanical activation and Pisko, with electronic activation. Pisko cost just 10 percent of an imported robotic prosthesis that will come from abroad. This means that even more working-class people can access our technology. For me, this has been a path where I was able to develop this in my company LAT Bionics. So, for example, take Franco, [who] now is using his transradial Maki prostheses in order to get back to work with his providers on the jungle farm he has.
I am certain that we are able to be on the side with technology that is brought from abroad to our region being sold in a very expensive way. We have the capacity to develop our own technology, having the necessities of our people in mind. So then people with disabilities and limited resources could live a life again. For me, when people, our users, get back to work on their places, that look of compassion changed to astonishment. The same astonishment which I had when I saw Luke Skywalker prosthesis.
So this began as a path for myself, but it now belongs to my entire region. Would you like to join us?
Thank you so much.

#Technology #Design #Invention #Innovation #Health #Prosthetics #TED_Fellows #3D_Printing

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