• The rise and fall of the Inca Empire – Gordon McEwan
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    The rise and fall of the Inca Empire – Gordon McEwan

    It was the Western Hemisphere’s largest empire ever, with a population of nearly 10 million subjects. Over an area of more than 900,000 square kilometers, its people built massive administrative centers, temples, and extensive road and canal systems. They did so in an inhospitable, extreme terrain, all without the use of wheels, horses, iron, or even written language. Yet within 100 years of its rise in the fifteenth century, the Inca Empire would be no more. According to legend, the ancestors of the Inca rulers were created by the sun god Inti, and they emerged from a cave called Tambo Toco. Leading four brothers and four sisters was Ayar Manco,…

  • What light can teach us about the universe – Pete Edwards
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    What light can teach us about the universe – Pete Edwards

    How and when did our universe begin? How did it get to look like this? How will it end? Humans have been discussing these questions for as long as they’ve been around without ever reaching much agreement. Today, cosmologists are working hard to find the answers. But how can anyone hope to find concrete answers to such profound questions? And how is it possible to explore and study something as huge as the universe, most of which we’ll never be able to reach? The answer is light. And although light from distant parts of the universe can take billions of years to reach us, it carries six unique messages that,…

  • The surprising cause of stomach ulcers – Rusha Modi
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    The surprising cause of stomach ulcers – Rusha Modi

    In 1984, an enterprising Australian doctor named Barry Marshall decided to take a risk. Too many of his patients were complaining of severe abdominal pain due to stomach ulcers, which are sores in the lining of the upper intestinal tract. At the time, few effective treatments for ulcers existed, and many sufferers required hospitalization or even surgery. Desperate for answers, Dr. Marshall swallowed a cloudy broth of bacteria collected from the stomach of one of his patients. Soon, Dr. Marshall was experiencing the same abdominal pain, bloating, and vomiting. Ten days later, a camera called an endoscope peered inside his insides. Marshall’s stomach was teeming with the same bacteria as…

  • How to love and be loved | Billy Ward | TEDxFoggyBottom
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    How to love and be loved | Billy Ward | TEDxFoggyBottom

    Translator: Ilze Garda Reviewer: Ariana Bleau Lugo Here’s the deal: Life is really all about love. I’m not just saying that because I’m a father of a newborn baby; I’m saying that because as a teacher and as a therapist I’ve seen people basically choose between two things: love or something else. What I’ve witnessed and experienced is this: When people choose love, they always choose right. I was asked to speak today on the topic of illumination, and it made me think about the way the light inside us all can shine. My favorite way is through our love which can illuminate in our relationships. The most important relationship…

  • Alan Kay: A powerful idea about teaching ideas
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    Alan Kay: A powerful idea about teaching ideas

    A great way to start, I think, with my view of simplicity is to take a look at TED. Here you are, understanding why we’re here, what’s going on with no difficulty at all. The best A.I. in the planet would find it complex and confusing, and my little dog Watson would find it simple and understandable but would miss the point. (Laughter) He would have a great time. And of course, if you’re a speaker here, like Hans Rosling, a speaker finds this complex, tricky. But in Hans Rosling’s case, he had a secret weapon yesterday, literally, in his sword swallowing act. And I must say, I thought of…

  • How to make a mummy – Len Bloch
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    How to make a mummy – Len Bloch

    Death and taxes are famously inevitable, but what about decomposition? As anyone who’s seen a mummy knows, ancient Egyptians went to a lot of trouble to evade decomposition. So, how successful were they? Living cells constantly renew themselves. Specialized enzymes decompose old structures, and the raw materials are used to build new ones. But what happens when someone dies? Their dead cells are no longer able to renew themselves, but the enzymes keep breaking everything down. So anyone looking to preserve a body needed to get ahead of those enzymes before the tissues began to rot. Neurons die quickly, so brains were a lost cause to Ancient Egyptian mummifiers, which…

  • Articles

    What causes cavities? – Mel Rosenberg

    When a team of archaeologists recently came across some 15,000 year-old human remains, they made an interesting discovery. The teeth of those ancient humans were riddled with holes. Their cavities were caused by the same thing that still plagues us today, specific tiny microbes that live in our mouths. These microbes are with us soon after birth. We typically pick them up as babies from our mothers’ mouths. And as our teeth erupt, they naturally begin to accumulate communities of bacteria. Depending on what we eat, and specifically how much sugar we consume, certain microbes can overpopulate and cause cavities. Diets high in sugary foods cause an explosion of bacteria…

  • The magic of Vedic math – Gaurav Tekriwal
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    The magic of Vedic math – Gaurav Tekriwal

    Translator: Andrea McDonough Reviewer: Bedirhan Cinar Nameste. I’m from India, and India is one of the oldest civilizations in the world. It has contributed to the world concepts such as yoga, ayurveda, spicy chicken tikka, and Vedic math. Vedic math is one of the world’s easiest and simplest way to do math. We are going to combine together and do some number crunching today. So what we are going to first do is multiply by 11. We’re going to do it together, so if you blink, you’re going to miss it. So just watch it, OK. So we’re going to do 32 times 11, OK. So we split 3, and…

  • Bring on the learning revolution! | Sir Ken Robinson
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    Bring on the learning revolution! | Sir Ken Robinson

    I was here four years ago, and I remember, at the time, that the talks weren’t put online. I think they were given to TEDsters in a box, a box set of DVDs, which they put on their shelves, where they are now. (Laughter) And actually, Chris called me a week after I’d given my talk, and said, “We’re going to start putting them online. Can we put yours online?” And I said, “Sure.” And four years later, it’s been downloaded four million times. So I suppose you could multiply that by 20 or something to get the number of people who’ve seen it. And, as Chris says, there is…

  • TEDxUW – Tanya De Mello – Here’s how you get a job at the UN
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    TEDxUW – Tanya De Mello – Here’s how you get a job at the UN

    Translator: Deborah Oliveira Reviewer: Denise RQ Whenever people find out that I have worked in the United Nations and I have worked in war-torn countries, with refugees all over the world, the first question they want to know is, “How did you end up at the UN? Tell me how to get there. I am dying to get there, just give me a tip.” So that is what I am here to talk about to you today. Not exactly how to end up at the UN, but how you can end up doing what you were meant to do, what you want to do, and what you should be doing.…