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👁What makes TB the world's most infectious killer? - Melvin Sanicas

🗣Subtitle: Farsi | English
👣In 2008, two 9,000-year old skeletons were found with their bones infected by an all too familiar bacterium. The ancient Greeks knew its effects as phthisis; the Incans called it chaky oncay; and today we call it tuberculosis, or TB. TB is still one of the world’s most infectious killers, causing more deaths than malaria or even HIV. How has it persisted for so long? Melvin Sanicas investigates.
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👁How we see color - Colm Kelleher

🗣Subtitle: Farsi | English | Turkish
👣There are three types of color receptors in your eye: red, green and blue. But how do we see the amazing kaleidoscope of other colors that make up our world? Colm Kelleher explains how humans can see everything from auburn to aquamarine.
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👁What creates a total solar eclipse? - Andy Cohen

🗣Subtitle: Farsi | English | Turkish
👣How can the shadow of the tiny moon eclipse the sight of the gargantuan sun? By sheer coincidence, the disc of the sun is 400x larger than the disc of the moon, but it's 390x farther from Earth -- which means that when they align just right, the moon blocks all but the sun's glowing corona. Andy Cohen details this extraordinary celestial phenomenon (and when it will next occur).
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👁How risk-taking changes a teenager's brain
🗣Subtitle: Farsi | English | Turkish

👣Why do teenagers sometimes make outrageous, risky choices? Do they suddenly become reckless, or are they just going through a natural phase? To find out, Kashfia Rahman -- winner of the Intel International Science and Engineering Fair (and a Harvard freshman) -- designed and conducted an experiment to test how high school students respond to and get used to risk, and how it changes their still-developing brains. What she discovered about risk and decision-making could change how we think about why teens do what they do.
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#TED_Salon_U.S._Air_Force #science #brain #psychology #youth #neuroscience #decision_making

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👁How the Band-Aid was invented | Moments of Vision 3 - Jessica Oreck

🗣Subtitle: Farsi | English | Turkish
👣It is estimated that Johnson & Johnson have made an astounding 100 billion Band-Aids since they were invented in 1920. But where did the idea come from? In the third installment of our ‘Moments of Vision’ series, Jessica Oreck shares the series of moments that inspired Earle Dickson to invent these popular household bandages.
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👁If matter falls down, does antimatter fall up? - Chloé Malbrunot

🗣Subtitle: Farsi | English | Turkish
👣
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👁An unexpected tool for understanding inequality: abstract math
🗣Subtitle: Farsi | English | Turkish

👣How do we make sense of a world that doesn't? By looking in unexpected places, says mathematician Eugenia Cheng. She explains how applying concepts from abstract mathematics to daily life can lead us to a deeper understanding of things like the root of anger and the function of privilege. Learn more about how this surprising tool can help us to empathize with each other.
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#TEDxLondon #math #communication #visualizations #TEDx #social_change #society #inequality

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👁An urgent call to protect the world's \"Third Pole\"
🗣Subtitle: Farsi | English

👣The Hindu Kush Himalaya region is the world's third-largest repository of ice, after the North and South Poles -- and if current melting rates continue, two-thirds of its glaciers could be gone by the end of this century. What will happen if we let them melt away? Environmentalist and former Prime Minister of Bhutan Tshering Tobgay shares the latest from the \"water towers of Asia,\" making an urgent call to create an intergovernmental agency to protect the glaciers -- and save the nearly two billion people downstream from catastrophic flooding that would destroy land and livelihoods.
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#TEDSummit_2019 #environment #nature #sustainability #government #climate_change #Anthropocene #politics #collaboration #glacier #conservation #Asia

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👁What is the world wide web? - Twila Camp

🗣Subtitle: Farsi | English | Turkish
👣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.
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👁Why the insect brain is so incredible - Anna Stöckl

🗣Subtitle: Farsi | English | Turkish
👣The human brain is one of the most sophisticated organs in the world, a supercomputer made of billions of neurons that control all of our senses, thoughts, and actions. But there was something Charles Darwin found even more impressive: the brain of an ant, which he called “one of the most marvelous atoms of matter in the world.” Anna Stöckl takes us inside the tiny but mighty insect brain.
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👁The mighty mathematics of the lever - Andy Peterson and Zack Patterson

🗣Subtitle: Farsi | English | Turkish
👣Archimedes once said “Give me a place to stand, and I shall move the Earth.” While the idea of a person moving such a huge mass on their own might sound impossible, chances are you’ve seen this idea in action at your local playground. Andy Peterson and Zack Patterson use the seesaw to illustrate the amazing implications and uses of the lever.
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👁Rethinking thinking - Trevor Maber

🗣Subtitle: Farsi | English
👣Every day, we meet people and process our interactions--making inferences and developing beliefs about the world around us. In this lesson, Trevor Maber introduces us to the idea of a ladder of inference and a process for rethinking the way we interact.
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👁An honest look at the personal finance crisis
🗣Subtitle: Farsi | English | Turkish

👣Millions of baby boomers are moving into their senior years with empty pockets and declining choices to earn a living. And right behind them is a younger generation facing the same challenges. In this deeply personal talk, author Elizabeth White opens up an honest conversation about financial trouble and offers practical advice for how to live a richly textured life on a limited income.
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#TEDxVCU #finance #aging #self #work #community #life #money #success #TEDx #economics

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👁Why should you read Edgar Allan Poe? - Scott Peeples

🗣Subtitle: Farsi | English | Turkish
👣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. Lesson by Scott Peeples, directed by Compote Collective.
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👁What is the biggest single-celled organism? - Murry Gans

🗣Subtitle: Farsi | English | Turkish
👣The elephant is a creature of epic proportions — and yet, it owes its enormity to more than 1,000 trillion microscopic cells. And on the epically small end of things, there are likely millions of unicellular species, yet there are very few we can see with the naked eye. Why is that? Why don’t we get unicellular elephants? Or blue whales? Or brown bears? Murry Gans explains.
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👁3 ways to practice civility
🗣Subtitle: Farsi | English

👣What does it mean to be civil? Journalist Steven Petrow looks for answers in the original meaning of the word, showing why civility shouldn't be dismissed as conversation-stifling political correctness or censorship. Learn three ways we can each work to be more civil -- and start talking about our differences with respect.
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👁Why are manhole covers round? - Marc Chamberland

🗣Subtitle: Farsi | English | Turkish
👣Why are most manhole covers round? Sure it makes them easy to roll, and slide into place in any alignment. But there’s another, more compelling reason, involving a peculiar geometric property of circles and other shapes. Marc Chamberland explains curves of constant width and Barbier’s theorem.
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👁The strengths and weaknesses of acids and bases - George Zaidan and Charles Morton

🗣Subtitle: Farsi | English | Turkish
👣Vinegar may have a powerful smell, but did you know it's actually a weak acid? In the chemical economy, acids actively give away their protons while bases actively collect them -- but some more aggressively than others. George Zaidan and Charles Morton use the currency of subatomic particles to explain this unseen exchange.
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👁The human skills we need in an unpredictable world
🗣Subtitle: Farsi | English

👣The more we rely on technology to make us efficient, the fewer skills we have to confront the unexpected, says writer and entrepreneur Margaret Heffernan. She shares why we need less tech and more messy human skills -- imagination, humility, bravery -- to solve problems in business, government and life in an unpredictable age. \"We are brave enough to invent things we've never seen before,\" she says. \"We can make any future we choose.\"
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#TEDSummit_2019 #government #business #technology #creativity #entrepreneur #future #work #AI #algorithm #innovation #social_change #humanity #leadership #society

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👁Who built Great Zimbabwe? And why? - Breeanna Elliott

🗣Subtitle: Farsi | English | Turkish
👣Stretched across a tree-peppered expanse in Southern Africa lies the ruins of Great Zimbabwe, a medieval stone city of astounding wealth. Located in the present-day country of Zimbabwe, it’s the site of the second largest settlement ruins in Africa. But its history is controversial, defined by decades of dispute about who built it and why. Breeanna Elliott explores the mystery of Great Zimbabwe.
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