TED Talks - آموزش زبان

When we consider all this evidence, along with the fact that elephants are one of the few species who can recognize themselves in a mirror, it's hard to escape the conclusion that they are conscious, intelligent, and emotional beings. Unfortunately, humanity's treatment of elephants does not reflect this, as they continue to suffer from habitat destruction in Asia, ivory poaching in Africa, and mistreatment in captivity worldwide. Given what we now know about elephants and what they continue to teach us about animal intelligence, it is more important than ever to ensure that what the English poet John Donne described as "nature's great masterpiece" does not vanish from the world's canvas. #TED_Ed #Education #Animals #Animation #Brain #Memory 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴Why elephants never forget It's a common saying that elephants never forget, but these magnificent animals are more than giant walking hard drives. The more we learn about elephants, the more it appears that their impressive memory is only one aspect of an incredible intelligence that makes them some of the most social, creative, and benevolent creatures on Earth. Unlike many proverbs, the one about elephant memory is scientifically accurate. Elephants know every member in their herd, able to recognize as many as 30 companions by sight or smell. This is a great help when migrating or encountering other potentially hostile elephants. They also remember and distinguish particular cues that signal danger and can recall important locations long after their last visit. But it's the memories unrelated to survival that are the most fascinating. Elephants remember not only their herd companions but other creatures who have made a strong impression on them. In one case, two circus elephants that had briefly performed together rejoiced when crossing paths 23 years later. This recognition isn't limited to others of their species. Elephants have also recognized humans they've bonded with after decades apart. All of this shows that elephant memory goes beyond responses to stimuli. Looking inside their heads, we can see why. The elephant boasts the largest brain of any land mammal, as well as an impressive encephalization quotient. This is the size of the brain relative to what we'd expect for an animal's body size, and the elephant's EQ is nearly as high as a chimpanzee's. And despite the distant relation, convergent evolution has made it remarkably similar to the human brain, with as many neurons and synapses and a highly developed hippocampus and cerebral cortex. It is the hippocampus, strongly associated with emotion, that aids recollection by encoding important experiences into long-term memories. The ability to distinguish this importance makes elephant memory a complex and adaptable faculty beyond rote memorization. It's what allows elephants who survived a drought in their youth to recognize its warning signs in adulthood, which is why clans with older matriarchs have higher survival rates. Unfortunately, it's also what makes elephants one of the few non-human animals to suffer from post-traumatic stress disorder. The cerebral cortex, on the other hand, enables problem solving, which elephants display in many creative ways. They also tackle problems cooperatively, sometimes even outwitting the researchers and manipulating their partners. And they've grasped basic arithmetic, keeping track of the relative amounts of fruit in two baskets after multiple changes. The rare combination of memory and problem solving can explain some of elephants' most clever behaviors, but it doesn't explain some of the things we're just beginning to learn about their mental lives. Elephants communicate using everything from body signals and vocalizations, to infrasound rumbles that can be heard kilometers away. And their understanding of syntax suggests that they have their own language and grammar. This sense of language may even go beyond simple communication. Elephants create art by carefully choosing and combining different colors and elements. They can also recognize twelve distinct tones of music and recreate melodies. And yes, there is an elephant band. But perhaps the most amazing thing about elephants is a capacity even more important than cleverness: their sense of empathy, altruism, and justice. Elephants are the only non-human animals to mourn their dead, performing burial rituals and returning to visit graves. They have shown concern for other species, as well. One working elephant refused to set a log down into a hole where a dog was sleeping, while elephants encountering injured humans have sometimes stood guard and gently comforted them with their trunk. On the other hand, elephant attacks on human villages have usually occurred right after massive poachings or cullings, suggesting deliberate revenge.

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When you wear a mask, you actually don't see the mask. And when you try to observe it, what you will see is inside of the mask. And that's your inward voice. So to understand why it's different, let's try to understand the mechanism of perception of this inward voice. Because your body has many ways of filtering it differently from the outward voice. So to perceive this voice, it first has to travel to your ears. And your outward voice travels through the air while your inward voice travels through your bones. This is called bone conduction. Because of this, your inward voice is going to sound in a lower register and also more musically harmonical than your outward voice. Once it travels there, it has to access your inner ear. And there's this other mechanism taking place here. It's a mechanical filter, it's a little partition that comes and protects your inner ear each time you produce a sound. So it also reduces what you hear. And then there is a third filter, it's a biological filter. Your cochlea -- it's a part of your inner ear that processes the sound -- is made out of living cells. And those living cells are going to trigger differently according to how often they hear the sound. It's a habituation effect. So because of this, as your voice is the sound you hear the most in your life, you actually hear it less than other sounds. Finally, we have a fourth filter. It's a neurological filter. Neurologists found out recently that when you open your mouth to create a sound, your own auditory cortex shuts down. So you hear your voice but your brain actually never listens to the sound of your voice. Well, evolutionarily that might make sense, because we know cognitively what we are going to sound like so maybe we don't need to spend energy analyzing the signal. And this is called a corollary discharge and it happens for every motion that your body does. The exact definition of a corollary discharge is a copy of a motor command that is sent by the brain. This copy doesn't create any motion itself but instead is sent to other regions of the brain to inform them of the impending motion. And for the voice, this corollary discharge also has a different name. It is your inner voice. So let's recapitulate. We have the mask, the outward voice, the inside of the mask, your inward voice, and then you have your inner voice. And I like to see this one as the puppeteer that holds the strings of the whole system. Your inner voice is the one you hear when you read a text silently, when you rehearse for an important conversation. Sometimes is hard to turn it off, it's really hard to look at the text written in your native language, without having this inner voice read it. It's also the voice that refuse to stop singing the stupid song you have in your head. And for some people it's actually impossible to control it. And that's the case of schizophrenic patients, who have auditory hallucinations. Who can't distinguish at all between voices coming from inside and outside their head. So in our lab, we are also working on small devices to help those people make those distinctions and know if a voice is internal or external. You can also think about the inner voice as the voice that speaks in your dream. This inner voice can take many forms. And in your dreams, you actually unleash the potential of this inner voice. That's another work we are doing in our lab: trying to access this inner voice in dreams. So even if you can't always control it, the inner voice -- you can always engage with it through dialogue, through inner dialogues. And you can even see this inner voice as the missing link between thought and actions. So I hope I've left you with a better appreciation, a new appreciation of all of your voices and the role it plays inside and outside of you -- as your voice is a very critical determinant of what makes you humans and of how you interact with the world. Thank you. #Hearing #TEDx #Sound #Human_Body #Humanity #Science #Self #Communication #Music 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

Your voice is also very linked with your hormone levels. Third parties listening to female voices were able to very accurately place the speaker on their menstrual cycle. Just with acoustic information. And now with technology listening to us all the time, Alexa from Amazon Echo might be able to predict if you're pregnant even before you know it. So think about -- Think about the ethical implications of that. Your voice is also very linked to how you create relationships. You have a different voice for every person you talk to. If I take a little snippet of your voice and I analyze it, I can know whether you're talking to your mother, to your brother, your friend or your boss. We can also use, as a predictor, the vocal posture. Meaning, how you decide to place your voice when you talk to someone. And you vocal posture, when you talk to your spouse, can help predict not only if, but also when you will divorce. So there is a lot to learn from listening to voices. And I believe this has to start with understanding that we have more than one voice. So, I'm going to talk about three voices that most of us posses, in a model of what I call the mask. So when you look at the mask, what you see is a projection of a character. Let's call that your outward voice. This is also the most classic way to think about the voice, it's a way of projecting yourself in the world. The mechanism for this projection is well understood. Your lungs contract your diaphragm and that creates a self-sustained vibration of your vocal fold, that creates a sound. And then the way you open and close the cavities in you mouth, your vocal tract is going to transform the sound. So everyone has the same mechanism. But voices are quite unique. It's because very subtle differences in size, physiology, in hormone levels are going to make very subtle differences in your outward voice. And your brain is very good at picking up those subtle differences from other people's outward voices. In our lab, we are working on teaching machines to understand those subtle differences. And we use deep learning to create a real-time speaker identification system to help raise awareness on the use of the shared vocal space -- so who talks and who never talks during meetings -- to increase group intelligence. And one of the difficulties with that is that your voice is also not static. We already said that it changes with every person you talk to but it also changes generally throughout your life. At the beginning and at the end of the journey, male and female voices are very similar. It's very hard to distinguish the voice of a very young girl from the voice of a very young boy. But in between, your voice becomes a marker of your fluid identity. Generally, for male voices there's a big change at puberty. And then for female voices, there is a change at each pregnancy and a big change at menopause. So all of that is the voice other people hear when you talk. So why is it that we're so unfamiliar with it? Why is it that it's not the voice that we hear? So, let's think about it.

🔴Why you don't like the sound of your own voice If you ask evolutionary biologists when did humans become humans, some of them will say that, well, at some point we started standing on our feet, became biped and became the masters of our environment. Others will say that because our brain started growing much bigger, that we were able to have much more complex cognitive processes. And others might argue that it's because we developed language that allowed us to evolve as a species. Interestingly, those three phenomena are all connected. We are not sure how or in which order, but they are all linked with the change of shape of a little bone in the back of your neck that changed the angle between our head and our body. That means we were able to stand upright but also for our brain to evolve in the back and for our voice box to grow from seven centimeters for primates to 11 and up to 17 centimetres for humans. And this is called the descent of the larynx. And the larynx is the site of your voice. When baby humans are born today, their larynx is not descended yet. That only happens at about three months old. So, metaphorically, each of us here has relived the evolution of our whole species. And talking about babies, when you were starting to develop in your mother's womb, the first sensation that you had coming from the outside world, at only three weeks old, when you were about the size of a shrimp, were through the tactile sensation coming from the vibrations of your mother's voice. So, as we can see, the human voice is quite meaningful and important at the level of the species, at the level of the society -- this is how we communicate and create bonds, and at the personal and interpersonal levels -- with our voice, we share much more than words and data, we share basically who we are. And our voice is indistinguishable from how other people see us. It is a mask that we wear in society. But our relationship with our own voice is far from obvious. We rarely use our voice for ourselves; we use it as a gift to give to others. It is how we touch each other. It's a dialectical grooming. But what do we think about our own voice? So please raise your hand if you don't like the sound of your voice when you hear it on a recording machine. Yeah, thank you, indeed, most people report not liking the sound of their voice recording. So what does that mean? Let's try to understand that in the next 10 minutes. I'm a researcher at the MIT Media Lab, part of the Opera of the Future group, and my research focuses on the relationship people have with their own voice and with the voices of others. I study what we can learn from listening to voices, from the various fields, from neurology to biology, cognitive sciences, linguistics. In our group we create tools and experiences to help people gain a better applied understanding of their voice in order to reduce the biases, to become better listeners, to create more healthy relationships or just to understand themselves better. And this really has to come with a holistic approach on the voice. Because, think about all the applications and implications that the voice may have, as we discover more about it. Your voice is a very complex phenomenon. It requires a synchronization of more than 100 muscles in your body. And by listening to the voice, we can understand possible failures of what happens inside. For example: listening to very specific types of turbulences and nonlinearity of the voice can help predict very early stages of Parkinson's, just through a phone call. Listening to the breathlessness of the voice can help detect heart disease. And we also know that the changes of tempo inside individual words is a very good marker of depression.

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🔴What is phantom traffic and why is it ruining your life? Self-driving cars are already cruising the streets today. And while these cars will ultimately be safer and cleaner than their manual counterparts, they can't completely avoid accidents altogether. How should the car be programmed if it encounters an unavoidable accident? Patrick Lin navigates the murky ethics of self-driving cars. #TED_Ed #Driverless_Cars #Cars #Morality #Machine_Learning #Technology #Animation #Education #Design #Innovation #Invention 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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How can we help birds together? There is now a chance for all of you to turn your passion for birds into contributing to their continued survival, and you can do that by becoming a citizen scientist. Citizen science is a growing trend around the world, and we are having scenarios where people are sharing information with the rest of the community about traffic updates, security alerts and so on. That is exactly what we realized as bird-watchers, and we thought, because birds are found everywhere, if we've got all of you and everyone else in Africa to tell us the birds they find where they live, where they school, or even where they work, then we can be able to come up with a map of every single species, and from there scientists will be able to actually prioritize conservation efforts to those habitats that matter the most. Take for example these two projects, the Africa Raptor DataBank, which is mapping all birds of prey in the continent of Africa, and the Kenya Bird Map, which is mapping about 1,100 species that occur in my country, Kenya. These two projects now have online databases that are allowing people to submit data, and this is converted into very interactive websites that the public can consume and make decisions from. But when we started, there was a big challenge. We received many complaints from bird-watchers, and they will say, "I'm in a village, and I cannot access a computer. How do I tell you what birds live in my home, or where I school, or where I work?" So we were forced to renovate our strategy and come up with a sustainable solution. It was easy: we immediately realized that mobile phones were becoming increasingly common in Africa and most of the regions could get access to one. So we came up with mobile phone applications that you can use on your iPhone and on your Android phone, and we made them freely available for every bird-watching enthusiast out there. So we came up with BirdLasser, which is used by the Kenya Bird Map, and also we have the African Raptor Observations, which is now used by the African Raptor DataBank. This was a huge breakthrough in our work and it made us get enormous amounts of data from every birder out there in the regions. With this, we realized that citizen science is indeed very powerful, the reason being, citizen science is adaptive. And we were able to actually convert many bird-watchers to start sharing new information with us. When we were starting, we didn't know that birds could be a huge gateway to approaching conservation of other forms of animals. Interestingly, now in the Virtual Museum for Africa, we have maps for dragonflies and damselflies, butterflies and moths, reptiles, frogs, orchids, spiders, scorpions, and yes, we are even mapping mushrooms. Who could have imagined mapping mushrooms? So this showed us that indeed we've created a community of people who care about nature in Africa. I hereby call upon all of you to join me in promoting the value of birds within your communities. Please just tell your friends about birds, for we are always inclined to love and care for that which we know. Please spend a few minutes in your free time when you are at work, at school, or maybe at home, to at least look around you and see which beautiful birds are there. Come join us in citizen science and tell us the birds you're finding in the places where you visit. Even simpler, you could buy your child or your sibling a pair of binoculars or a bird book and let them just appreciate how beautiful these birds are. Because maybe one day they will want to care for that one which they know and love. The children indeed are our future. Let us please teach them to love our feathermakers, because the love of birds can be a huge gateway to appreciating all forms of nature. Thank you very much. Thank you. #Animals #love #Brain #Biology #Consciousness #Cognitive_Science #Mind #Evolution #Life #Mission_Blue #Science_Oceans #Empathy #Neuroscience #Mental_Health #Birds #Monkeys #Fish #Environment 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

And birds help us so much, and they play very crucial roles in our ecosystems each day. Vultures clean up our environment by literally digesting disease-causing pathogens, and they finish carcasses that would otherwise cost us lots of money to clear from the environment. A sizable flock of vultures is capable of bringing down a carcass the size of a zebra straight to the bone within just about 30 minutes. Owls help to rid the environments of rodents and this helps us a lot because it saves us money -- we don't lose our crops -- and secondly, we don't have to buy harmful chemicals to handle these rodents. The beautiful sunbirds we see in our environments are part of nature's pollination crew, and they help our plants to form fruits. Together with other pollinators like insects, they have actually helped us to get most of the food crops that we depend on for many years. Unfortunately, the story of birds is by far not perfect. They are faced by numerous challenges every day wherever they live. Top on the threats facing birds is habitat loss and reduced food availability. Birds are also hunted, especially migratory species and ducks that congregate in water bodies. Poisoning is happening to flocks that like to stick together, especially in places like rice schemes. Moreover, power lines are electrocuting birds and wind farms are slicing birds when they fly through the blades. Recently, we've heard the talk of climate change making a lot of headlines, and it's also affecting birds, because birds are being forced to migrate to better breeding and feeding grounds because unfortunately where they used to live is no longer habitable. My own perspective towards birds was changed when I was a small boy in high school, and there was this boy who struck, injuring the wing and the leg of a bird we called the augur buzzard. I was standing there, just a mere 14-year-old, and I imagined a human being in a similar situation, because this bird could not help itself. So even if I was hardly any biologist by then, I gathered with three of my friends and we decided to house the bird until it had regained strength and then let it free. Interestingly, it accepted to feed on beef from our school kitchen, and we hunted termites around the compound for its dinner every day. After a few days, it had regained strength and we released it. We were so happy to see it flap its wings and fly off gracefully. And that experience changed the way we looked at birds. We went on to actually make a magazine, and we called it the Hawk Magazine, and this was in honor of this bird that we had helped within our own high school. Those experiences in high school made me the conservationist I am today. And a passion for birds should especially matter for Africa and all Africans, because among all other continents, Africa hosts some of the most amazing bird species you can find anywhere in the world. Imagine having a name like "shoebill." That's the name of that bird. And there are countries like DR Congo, Tanzania, Uganda and Kenya who are leading the continent in highest numbers of diversity when it comes to the species. These birds continue to provide the continent with very crucial ecosystem services that Africa needs. Moreover, there is huge potential for Africa to lead the world in avian tourism. The economy will definitely benefit. Imagine how many communities will benefit from groups of tourists visiting their villages just to see the endemic birds that can only be found in those villages.

🔴For the love of birds With me here today I brought something beautiful. This is a feather from one of the most beautiful birds we have in Kenya, the crested guinea fowl. But this feather is more than just that. If you've taken time when you are outdoors to look at the feathers around you, you'll have noticed that there is this huge variety of different sizes, shapes and even colors. The feather is one of the most astonishing pieces of technology invented by the natural world, and for centuries, this feather has helped birds to keep dry, to keep warm and even power flight. Only one section of the tree of life can actually make a feather. Among all the world's animals, birds are the only ones who can make something like what I'm holding today. I personally have given them a nickname, and I like to call them the feathermakers. It is the major difference between birds and any other animals we have on earth, and if you can't make a feather, you cannot call yourself a bird. For us humans, who are earthbound, birds represent freedom. This feather has enabled birds to conquer gravity and take to the air in an extraordinary way. Don't you sometimes wish you could fly like a bird? Birds are my passion, and I want to change the way each one of you thinks about them. The easiest reason I love them so much is because they are beautiful. There are 10,000 species in the world, and each one of them is uniquely beautiful. Birds are amazing, and this talk is dedicated to all the birds of the world. Indeed, these birds have been part of our lives and cultures all over the world for centuries, and every society has a story about birds. You probably have heard childhood stories of different birds and how they relate with man. I personally recently learned that our human ancestors would follow flocks of vultures and then they would help them to identify where carcasses have been dropped by large carnivores, and these humans will scavenge and eat part of that meat. Birds have been used as brands and labels all over the world. You know the bald eagle? It was chosen as the national emblem for the US because of its majestic strength, beautiful looks and even a long lifespan. And just like us humans who have managed to live in virtually all habitats of this earth, birds have also conquered the world. From birds such as these beautiful penguins that live in the cold ice caps to even others like the larks, who live in the hottest deserts you can imagine. Indeed, these species have conquered this world. Birds also build houses like us. The real pros in housebuilding are a group of birds we call the weaverbirds, and this name they were given because of the way in which they weave their nests. An interesting one: birds also love and date just like us humans. In fact, you'll be surprised to know that males dress to impress the women, and I'll show you how. So here we have a long-tailed widowbird, and this is how they would normally look. But when it comes to the breeding season, everything changes, and this is how he looks. Yeah? Birds also, multiple species of them, do love to touch and cuddle just like humans. And I know you're wondering about this one. Yes, they kiss too, sometimes very deeply. Some have even learned to cheat on their spouses. For example, the African jacana: the females will mate with multiple males and then she takes off to find other males to mate with and she leaves the male behind to take care of the chicks.

🔴For the love of birds #Animals #love #Brain #Biology #Consciousness #Cognitive_Science #Mind #Evolution #Life #Mission_Blue #Science_Oceans #Empathy #Neuroscience #Mental_Health #Birds #Monkeys #Fish #Environment 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜