Ed.ted.com - Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how “power posing” -- standing in a posture of confidence, even when we don’t feel confident -- can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success.

 
Morgan Stanley’s soon-to-be chief executive Ted Pick and his two top lieutenants were granted stock options that could net them tens of millions of dollars …. The list crawler

101. Md. 102. No. 103. Lr. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Now try to remember what you had for lunch three weeks ago. That second memory probably isn’t as strong—but why not? Why do we remember some things, and not others? And why do memories eventually fade? Catharine Young gives the basics on memory and memory loss. Watch. Think.Director Patrick Smith. Composer Stephen LaRosa. Sound Designer Weston Fonger. Narrator Gary Frank. What if Anne Frank hadn’t kept a diary? What if no one could listen to Martin Luther King’s Mountaintop speech? What if the camera hadn’t been rolling during the first moon landing? Actively listening to the voices of the past and the ...Educator Emma Bryce. Animator Qa'ed Mai. Script Editor Eleanor Nelsen. Narrator Addison Anderson. We hear about calories all the time: How many calories are in this cookie? How many are burned by doing 100 jumping jacks, or long-distance running, or fidgeting? But what is a calorie, really? And how many of them do we actually need? TED-Ed lessons on all subjects. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Producer Aaron Augenblick, Lisa Thomas. Director Hal Lee. Animator Ioana Nistor. Educator Lauren Royal-Woods. Narrator Lauren Royal-Woods. Scientific discovery isn't as simple as one good experiment. The weird and wonderful history of cell theory illuminates the twists and turns that came together to build the foundations of biology.Let’s Begin…. The purpose of this module is to have you reflect, in detail, about your week, where your time goes and how to write a smart to-do list. By making a list and reflecting on your time, you will be able to accurately shift your …TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.In the United States, it's estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn't just a minor inconvenience: staying awake can cause serious bodily harm. Claudia Aguirre shows what happens to your body and brain when you skip sleep. [Directed by TED-Ed, narrated by Addison Anderson, music by Carlos …The TED-Ed project — TED's education initiative — makes short video lessons worth sharing, aimed at educators and students. Within TED-Ed's growing library of lessons, you will find carefully curated educational videos, many of which are collaborations between educators and animators nominated through the TED-Ed platform.Let’s Begin…. In the United States, it’s estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn’t just a minor inconvenience: staying awake can cause serious bodily harm. Claudia Aguirre shows what happens to your body and brain when you skip sleep. Create and share a new lesson based on ... You are being redirected.The discovery of the structure of DNA was one of the most important scientific achievements in human history. The now-famous double helix is almost synonymous with Watson and Crick, two of the scientists who won the Nobel prize for figuring it out. But there’s another name you may not know: Rosalind Franklin. Cláudio L. Guerra shares the true story of …Damon Brown gives the inside scoop on how the opinions and facts (and sometimes non-facts) make their way into the news and how the smart reader can tell them apart. Watch. Think. Dig Deeper. Discuss. Customize this lesson 1887. Create and share a new lesson based on this one. Now try to remember what you had for lunch three weeks ago. That second memory probably isn’t as strong—but why not? Why do we remember some things, and not others? And why do memories eventually fade? Catharine Young gives the basics on memory and memory loss. Watch. Think.Narrator Susan Zimmerman. Over-the-counter pregnancy tests give potentially life-changing results with a pretty high rate of accuracy. But how do they work? Tien Nguyen explains how each test performs a scientifically rigorous, multi-stage experiment that goes from start to finish in the time that it’ll take you to watch this video.Climate Visuals and TED Countdown released a library of 100 open source photographs, making impactful and effective climate imagery freely accessible to organizations around the world. The images were selected from +5,500 unique submissions spanning +150 countries. Close. 240M. 240 million. 1 5 0 M. 1 5 0 M. 1 5 0 M. 1 5 0 M. 2 4 0 M. 1 5 0 M ...Despite water covering 71% of the planet's surface, more than half the world's population endures extreme water scarcity for at least one month a year. Current estimates predict that by 2040, up to 20 more countries could be experiencing water shortages. These statistics raise a startling question: is the Earth running out of clean water? Balsher Singh Sidhu …These existential questions are central to the five major world religions -- and that’s not all that connects these faiths. John Bellaimey explains the intertwined histories and cultures of Hinduism, Judaism, Buddhism, Christianity and Islam. The five major world religions - John Bellaimey. Watch. Think. TED Talks are influential videos from expert speakers on education, business, science, tech and creativity, with subtitles in 100+ languages. Ideas free to stream and download. TED-Ed lessons on the subject Business. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.TED-Ed lessons on the subject Psychology. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Everything TED-Ed does supports learning — whether it's producing a growing video library of original animated lessons, providing an international platform for teachers to create their own interactive lesson plans, helping curious students around the globe bring TED to their schools and gain presentation literacy skills, or celebrating innovativ... Slavery has occurred in many forms throughout the world, but the Atlantic slave trade -- which forcibly brought more than 10 million Africans to the Americas -- stands out for both its global scale and its lasting legacy. Anthony Hazard discusses the historical, economic and personal impact of this massive historical injustice. Watch. Think.The discovery of the structure of DNA was one of the most important scientific achievements in human history. The now-famous double helix is almost synonymous with Watson and Crick, two of the scientists who won the Nobel prize for figuring it out. But there’s another name you may not know: Rosalind Franklin. Cláudio L. Guerra shares the true story of …The training montage. Many people love to glorify victory on the field, cheer for teams, and play sports. But should we be obsessed with sports? Are sports as good for us as we make them out to be, or are they just a fun and entertaining pastime? Leah Lagos and Jaspal Ricky Singh show what science has to say on the matter. Watch. Think.Inside you, a daily battle is being waged and your immune system is at the frontline. Most of the time, you may not even notice it's there, but over the course of your life your immune system will guard you against hundreds of potentially fatal threats. Emma Bryce explores the different components of this system and how, together, they do their ...Educator Kelly Wall. Script Editor Mia Nacamulli. Director Tomás Pichardo-Espaillat. Animator Tomás Pichardo-Espaillat. Composer Cem Misirlioglu. Narrator Julianna Zarzycki. See more creators. Spray-painted subway cars, tagged bridges, mural-covered walls – graffiti pops up boldly throughout our cities. And it turns out: it’s nothing new.Educator Stuart Vyse. Director Biljana Labović. Script Editor Alex Gendler. Storyboard Artist Jérémie Balais, Jeff Le Bars. Animator Jeff Le Bars, Jérémie Balais. Sound Designer Clément Soulisse. Sound Mastering Rémi Lambrinidis. Associate Producer Jessica Ruby. Content Producer Gerta Xhelo.TED Podcasts | TED TED Podcasts Subscribe to listen on Apple Podcasts, the TED Android app, or wherever you get your podcasts. Better yet, write us a review! We love hearing …Now try to remember what you had for lunch three weeks ago. That second memory probably isn’t as strong—but why not? Why do we remember some things, and not others? And why do memories eventually fade? Catharine Young gives the basics on memory and memory loss. Watch. Think.Noah Zandan uses some famous examples of lying to illustrate how we might use communications science to analyze the lies themselves. Watch. Think. Dig Deeper. Discuss. Customize this lesson 1172. Create and share a new lesson based on this one.TED Conferences, LLC (Technology, Entertainment, Design) is an American-Canadian non-profit media organization that posts international talks online for free distribution under the slogan "ideas worth spreading". It was founded by Richard Saul Wurman and Harry Marks in February 1984 as a technology conference, in which Mickey Schulhof gave a demo of the compact disc that was invented in ...TED en Español. TED en Español en NYC 2018. Juan Enriquez: La selección latinoamericana de cerebros. Juan Enriquez nos propone una manera de abordar la educación en América Latina para aprovechar las oportunidades de las disrupciones tecnológicas que van a cambiar las reglas de juego de muchas industrias en los próximos años. Mira la ...DIY Neuroscience Watch science in action in this original TED series about cutting-edge neuroscience experiments on a shoestring budget. Watch now Small Thing Big Idea This …The short story “On the Sidewalk Bleeding” by Ed McBain tells the story of Andy, who bleeds to death after being stabbed. Andy is a 16-year-old boy who belongs to a gang called the Royals. He is stabbed under the ribs by a member of a rival...Stay curious! Students start here Educators start here Parents start here. Check out Earth School to understand and celebrate our planet. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Earth School is a 10-step action plan designed to help us reach net zero emissions by 2050. Through curated content and supporting lesson materials, Earth School lays out the …View full lesson: http://ed.ted.com/lessons/how-do-cancer-cells-behave-differently-from-healthy-ones-george-zaidanHow do cancer cells grow? How does chemothe...View full lesson: https://ed.ted.com/lessons/why-it-s-so-hard-to-cure-hiv-aids-janet-iwasaIn 2008, something incredible happened: a man was cured of HIV. In ...Imagine that your life began as one of the planet's first humans. After dying, you're reincarnated as the second human ever to live. You then return as the third person, the fourth, the fifth, and so on – living the lives of every human that's ever walked the Earth. How will your actions in one life impact your future selves? Explore the ethics of the …Nous voudrions effectuer une description ici mais le site que vous consultez ne nous en laisse pas la possibilité.View full lesson: http://ed.ted.com/lessons/why-do-we-dream-amy-adkinsIn the 3rd millennium BCE, Mesopotamian kings recorded and interpreted their dreams on ...TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas. Educator Emma Bryce. Animator Qa'ed Mai. Script Editor Eleanor Nelsen. Narrator Addison Anderson. We hear about calories all the time: How many calories are in this cookie? How many are burned by doing 100 jumping jacks, or long-distance running, or fidgeting? But what is a calorie, really? And how many of them do we actually need? Erectile dysfunction (ED) is a condition that leaves men unable to get or keep an erection for long enough to enjoy sex. If this sounds familiar, then rest assured that you’re not alone — ED affects as many as 30 million men in the United S...Discover ideas that spark the curiosity of learners. Browse hundreds of TED-Ed Animations and TED Talks designed to spark your child’s curiosity. You'll also find thousands of other video-based lessons organized by age-level and subject.Feed and expand your curiosity with our award-winning animated shorts - published on YouTube and available with supplemental learning materials on ed.ted.com. Want to suggest an idea for a...The coronavirus or COVID-19 pandemic is impacting every nation on Earth. Whether it is the deadly nature and rapid transmission of this new virus or the life-changing economic impacts being felt around the world, we are being called into action to cure a new disease and to reconsider how we as humans interact. Kurzgesagt details what actually happens when COVID-19 infects a ...101. Md. 102. No. 103. Lr. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.The TED-Ed project — TED's education initiative — makes short video lessons worth sharing, aimed at educators and students. Within TED-Ed’s growing library of lessons, you will find carefully curated educational videos, many of which are collaborations between educators and animators nominated through the TED-Ed platform.TED-Ed’s mission is to create lessons worth sharing. Feed and expand your curiosity with our award-winning animated shorts - published on YouTube and availab...772,647 Views. 1. 2. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.TED-Ed lessons on all subjects. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas. The prisoner strapped under a descending pendulum blade. A raven who refuses to leave the narrator’s chamber. A beating heart buried under the floorboards. Poe’s macabre and innovative stories of gothic horror have left a timeless mark on literature. But just what is it that makes Edgar Allan Poe one of the greatest American authors? Scott Peeples investigates.Meet The Creators. Our hard-wired stress response is designed to give us the quick burst of heightened alertness and energy needed to perform our best. But stress isn’t all good. When activated too long or too often, stress can damage virtually every part of our body. Sharon Horesh Bergquist gives us a look at what goes on inside our body ... About Earth School. Earth School is an immersive learning adventure to celebrate our planet, and understand what we need to do to save it. Now more than ever, we need to champion and accelerate solutions to the climate crisis, and turn these ideas into action. Each lesson in Earth School has been selected to help you build an understanding of ...TED-Ed lessons on the subject Business. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas. Sound Designer Eric Hoffman. Director Mark Phillips. Narrator Christina Greer. Business & Economics. You vote, but then what? Discover how your individual vote contributes to the popular vote and your state’s electoral vote in different ways--and see how votes are counted on both state and national levels.TED-Ed lessons on all subjects. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Producer Aaron Augenblick, Lisa Thomas. Director Hal Lee. Animator Ioana Nistor. Educator Lauren Royal-Woods. Narrator Lauren Royal-Woods. Scientific discovery isn't as simple as one good experiment. The weird and wonderful history of cell theory illuminates the twists and turns that came together to build the foundations of biology. Theodore Robert Bundy, otherwise known as Ted, was a high-profile serial killer in the 70s. Although his crimes were horrific, some people found him so handsome and charismatic that he became something of a celebrity while on trial.View full lesson: http://ed.ted.com/lessons/the-science-of-spiciness-rose-evelethWhen you take a bite of a hot pepper, your body reacts as if your mouth is o...TED-Ed TED-Ed. TED-Ed Lessons. What is a TED-Ed lesson? How do I create TED-Ed Lessons? How do I create TED-Ed Accounts? How do I manage my TED-Ed lessons? How can I separate student responses from different or new classes? General TED-Ed lessons FAQ; TED-Ed Student Talks.Flow is more than just concentrating or paying attention; it's a unique mental state of effortless engagement. And those who more frequently experience flow report higher levels of positive emotions, creativity, and feelings of accomplishment. But what exactly is flow? And how can we find it in our daily lives? Explore steps you can take to increase your …Meet the TED-Ed Educator Talks cohort of 2023! The TED-Ed team is pleased to introduce this year’s cohort of educators selected for the Educator Talks program. The TED-Ed …Customize this lesson 41. Create and share a new lesson based on this one. From speed limits to limited capacity elevators, we're used to limits in our daily lives. But, what about in mathematics? Limits are essential to calculus and are …Create lessons around any TED-Ed Animation, TED talk or YouTube video. You can search for and select a video, then add interactive questions, discussion topics and more. Share the lessons with your students online and track the results. Try it out . Inspire your students to share their big ideas. Inspire students to share their ideas with the world. In our Student …Create lessons around any TED-Ed Animation, TED talk or YouTube video. You can search for and select a video, then add interactive questions, discussion topics and more. Share the lessons with your students online and track the results. Try it out . Inspire your students to share their big ideas. Inspire students to share their ideas with the world. In our Student …Let’s Begin…. Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how “power posing” -- standing in a posture of confidence, even when we don’t feel confident -- can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances ...Meet The Creators. Educator Akshita Agarwal. Script Editor Alex Gendler. Animator Qa'ed Mai. Narrator Julianna Zarzycki. Design, Engineering & Technology. Science & Technology. Imagine you’re on a game show and you can choose between two prizes: a diamond … or a bottle of water. It’s an easy choice – the diamonds are more valuable. 【TED-ED 700集】B站最好英语合集，刷一遍绝对能让你英语口语起飞！共计732条视频，包括：“What happened when we all stopped” narrated by Jane Goodall、5 tips to improve your critical thinking - Samantha Agoos、3 tips to boost your confidence - TED-Ed等，UP主更多精彩视频，请关注UP账号。Erectile dysfunction (ED) is a condition that leaves men unable to get or keep an erection for long enough to enjoy sex. If this sounds familiar, then rest assured that you’re not alone — ED affects as many as 30 million men in the United S...TED-Ed's commitment to creating lessons worth sharing is an extension of TED's mission of spreading great ideas. Within TED-Ed's growing library of TED-Ed animations, you will find carefully curated educational videos, many of which represent collaborations between talented educators and animators nominated through the TED-Ed website (ed.ted.com).Earth School is a 10-step action plan designed to help us reach net zero emissions by 2050. Through curated content and supporting lesson materials, Earth School lays out the …Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how “power posing” -- standing in a posture of confidence, even when we don’t feel confident -- can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success.Slavery has occurred in many forms throughout the world, but the Atlantic slave trade -- which forcibly brought more than 10 million Africans to the Americas -- stands out for both its global scale and its lasting legacy. Anthony Hazard discusses the historical, economic and personal impact of this massive historical injustice. Watch. Think.Ted's bets for October 28 & 29 Get the best out of this weekend's action with odds from our best horse racing betting sites per our expert reviews. Odds are subject to change.Rejection hurts. It's incredibly painful to feel like you're not wanted — and we do mean painful. Researchers found that we relate rejection to being "hurt," using terms like "crushed" or "broken-hearted." So, why does rejection trigger such a strong response, and is there any way to cope with this unique kind of pain? Explore common strategies to help you …Ted's bets for October 27 Get get ready for the action at The Showcase at Cheltenham with the best horse racing betting sites per our expert reviews. Odds are …The short story “On the Sidewalk Bleeding” by Ed McBain tells the story of Andy, who bleeds to death after being stabbed. Andy is a 16-year-old boy who belongs to a gang called the Royals. He is stabbed under the ribs by a member of a rival...How do I sign up for a TED.com account? Signing up for a TED.com account allows you to... create a profile, including photo and bio like or save talks to watch later keep track of …Let’s Begin…. We hear a lot about how to speak well in public, but very little about how to learn the equally important art of listening properly to others. This video describes four steps to becoming a good listener. Create and share a new lesson based on this one.The Earth intercepts a lot of solar power: 173,000 terawatts. That’s 10,000 times more power than the planet’s population uses. So is it possible that one day the world could be completely reliant on solar energy? Richard Komp examines how solar panels convert solar energy to electrical energy.View full lesson: http://ed.ted.com/lessons/history-vs-christopher-columbus-alex-gendlerMany people in the United States and Latin America have grown up cele...The World Wide Web is used every day by millions of people for everything from checking the weather to sharing cat videos. But what is it exactly? Twila Camp describes this interconnected information system as a virtual city that everyone owns and explains how it’s organized in a way that mimics our brain’s natural way of thinking. Watch.Slavery has occurred in many forms throughout the world, but the Atlantic slave trade -- which forcibly brought more than 10 million Africans to the Americas -- stands out for both its global scale and its lasting legacy. Anthony Hazard discusses the historical, economic and personal impact of this massive historical injustice. Watch. Think.Let’s Begin…. When we talk about ‘English’, we often think of it as a single language. But what do the dialects spoken in dozens of countries around the world have in common with each other, or with the writings of Chaucer? Claire Bowern traces the language from the present day back to its ancient roots, showing how English has evolved ...Meet The Creators. Educator Akshita Agarwal. Script Editor Alex Gendler. Animator Qa'ed Mai. Narrator Julianna Zarzycki. Design, Engineering & Technology. Science & Technology. Imagine you’re on a game show and you can choose between two prizes: a diamond … or a bottle of water. It’s an easy choice – the diamonds are more valuable.

TED-Ed. 6,362,572 likes · 15,134 talking about this. TED-Ed is TED's education initiative. Our mission is to capture and amplify the voices of great educa. Resulta borlette georgia

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Narrator Susan Zimmerman. Over-the-counter pregnancy tests give potentially life-changing results with a pretty high rate of accuracy. But how do they work? Tien Nguyen explains how each test performs a scientifically rigorous, multi-stage experiment that goes from start to finish in the time that it’ll take you to watch this video.Damon Brown gives the inside scoop on how the opinions and facts (and sometimes non-facts) make their way into the news and how the smart reader can tell them apart. Watch. Think. Dig Deeper. Discuss. Customize this lesson 1887. Create and share a new lesson based on this one.Nous voudrions effectuer une description ici mais le site que vous consultez ne nous en laisse pas la possibilité.Stay curious! Students start here Educators start here Parents start here. Check out Earth School to understand and celebrate our planet. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Why thinking about death helps you live a better life - Alua Arthur. 128,609 Views. 1. 2. 3. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Narrator Addison Anderson. We have over 600 muscles in our bodies that help bind us together, hold us up, and help us move. Your muscles also need your constant attention, because the way you treat them on a daily basis determines whether they will wither or grow. Jeffrey Siegel illustrates how a good mix of sleep, nutrition and exercise keep ...Educator Emma Bryce. Director Andrew Zimbelman. Producer Andrea Sertz Jew. Composer Dave Feddock. Script Editor Alex Gendler. See more creators. When you breathe, you transport oxygen to the body’s cells to keep them working, while also clearing your system of the carbon dioxide that this work generates. How do we accomplish this crucial and ...Host communities have the opportunity to share Countdown content and showcase their own innovative climate solutions with the world through the TED stage. Countdown Summit The 2023 Countdown Summit brought together 700+ leaders in Detroit, Michigan to share game changing innovations and bold actions moving us closer to a net-zero world.About TED Translators. Read about the evolution of TED's translation initiative. Need help? We're here for you. Contact us at [email protected]. TED Translators are volunteers who subtitle TED Talks, and enable the inspiring ideas in them to crisscross languages and borders.【TED-ED 700集】B站最好英语合集，刷一遍绝对能让你英语口语起飞！共计732条视频，包括：“What happened when we all stopped” narrated by Jane Goodall、5 tips to improve your critical thinking - Samantha Agoos、3 tips to boost your confidence - TED-Ed等，UP主更多精彩视频，请关注UP账号。TED-Ed lessons on all subjects. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Stay curious! Check out Earth School to understand and celebrate our planet. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.Producer Aaron Augenblick, Lisa Thomas. Director Hal Lee. Animator Ioana Nistor. Educator Lauren Royal-Woods. Narrator Lauren Royal-Woods. Scientific discovery isn't as simple as one good experiment. The weird and wonderful history of cell theory illuminates the twists and turns that came together to build the foundations of biology.TED-Ed lessons on all subjects. TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.It’s 4am, and the big test is in 8 hours. You’ve been studying for days, but you still don’t feel ready. Should you drink another cup of coffee and spend the next few hours cramming? Or should you go to sleep? Shai Marcu defends the latter option, showing how sleep restructures your brain in a way that’s crucial for how our memory works ...TED-Ed’s mission is to create lessons worth sharing. Feed and expand your curiosity with our award-winning animated shorts - published on YouTube and available with supplemental learning ...View full lesson: https://ed.ted.com/lessons/why-it-s-so-hard-to-cure-hiv-aids-janet-iwasaIn 2008, something incredible happened: a man was cured of HIV. In ...TED-Ed. @TED_ED. ·. Tulsa's "Black Wall Street" was one of the most prosperous neighborhoods in America. But then, on this day in 1921, it was burned to the ground. Dig into one of the worst incidents of racial violence in American history: ed.ted.com..

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