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What triggers a chemical reaction? - Kareem Jarrah

What triggers a chemical reaction? - Kareem Jarrah | TEDtalks | Scoop.it
Chemicals are in everything we see, and the reactions between them can look like anything from rust on a spoon to an explosion on your stovetop. But why do these reactions happen in the first place? Kareem Jarrah answers this question by examining the two underlying forces that drive both endothermic and exothermic chemical reactions: enthalpy and entropy.
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How do vaccines work? - Kelwalin Dhanasarnsombut

How do vaccines work? - Kelwalin Dhanasarnsombut | TEDtalks | Scoop.it
The first ever vaccine was created when Edward Jenner, an English physician and scientist, successfully injected small amounts of a cowpox virus into a young boy to protect him from the related (and deadly) smallpox virus. But how does this seemingly counterintuitive process work? Kelwalin Dhanasarnsombut details the science behind vaccines.
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Einstein's miracle year - Larry Lagerstrom

Einstein's miracle year - Larry Lagerstrom | TEDtalks | Scoop.it
As the year 1905 began, Albert Einstein faced life as a “failed” academic. Yet within the next twelve months, he would publish four extraordinary papers, each on a different topic, that were destined to radically transform our understanding of the universe. Larry Lagerstrom details these four groundbreaking papers.
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The history of the barometer (and how it works) - Asaf Bar-Yosef

The history of the barometer (and how it works) - Asaf Bar-Yosef | TEDtalks | Scoop.it
A barometer is an instrument that measures air pressure, allowing weather forecasters and scientists to better predict extreme weather events. Despite its incredible usefulness, inventing the barometer was no walk in the park. Asaf Bar-Yosef describes the series of scientists and events that contributed to the birth of the barometer -- and explains how it actually works.
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What makes tattoos permanent? - Claudia Aguirre

What makes tattoos permanent? - Claudia Aguirre | TEDtalks | Scoop.it
The earliest recorded tattoo was found on a Peruvian mummy in 6,000 BC. That’s some old ink! And considering humans lose roughly 40,000 skin cells per hour, how do these markings last? Claudia Aguirre details the different methods, machines and macrophages (you’ll see) that go into making tattoos stand the test of time.
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Which country does the most good for the world?

Which country does the most good for the world? | TEDtalks | Scoop.it
It's an unexpected side effect of globalization: problems that once would have stayed local—say, a bank lending out too much money—now have consequences worldwide. But still, countries operate independently, as if alone on the planet. Policy advisor Simon Anholt has dreamed up an unusual scale to get governments thinking outwardly: The Good Country Index. In a riveting and funny talk, he answers the question, "Which country does the most good?" The answer may surprise you (especially if you live in the US or China).
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A guide to the energy of the Earth - Joshua M. Sneideman

A guide to the energy of the Earth - Joshua M. Sneideman | TEDtalks | Scoop.it
Energy is neither created nor destroyed — and yet the global demand for it continues to increase. But where does energy come from, and where does it go? Joshua M. Sneideman examines the many ways in which energy cycles through our planet, from the sun to our food chain to electricity and beyond.
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A-rhythm-etic. The math behind the beats - Clayton Cameron

A-rhythm-etic. The math behind the beats - Clayton Cameron | TEDtalks | Scoop.it
Ready to dance in your seat? Drummer Clayton Cameron breaks down different genres of music—from R&B to Latin to pop—by their beats. A talk that proves hip hop and jazz aren't cooler than math—they simply rely on it.
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Music and creativity in Ancient Greece - Tim Hansen

Music and creativity in Ancient Greece - Tim Hansen | TEDtalks | Scoop.it
You
think you love music? You have nothing on the Ancient Greek obsession.
Every aspect of Greek life was punctuated by song: history, poetry,
theater, sports and even astronomy.
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Chris Downey: Design with the blind in mind | Video on TED.com

What would a city designed for the blind be like?
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Dan Ariely: Are we in control of our own decisions? | Video on TED.com

Behavioral economist Dan Ariely, the author of Predictably Irrational, uses classic visual illusions and his own counterintuitive (and sometimes shocking) research findings to show how we're not as rational as we think when we make decisions.
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Architectural inspiration | TED Playlists | TED

Architectural inspiration | TED Playlists | TED | TEDtalks | Scoop.it
Master architects share their vision for buildings that inflate, float, twist and glitter, while artfully addressing the challenges faced by their residents, their cities and the planet.
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Creative problem-solving in the face of extreme limits

Creative problem-solving in the face of extreme limits | TEDtalks | Scoop.it
Navi Radjou has spent years studying "jugaad," also known as frugal innovation. Pioneered by entrepreneurs in emerging markets who figured out how to get spectacular value from limited resources, the practice has now caught on globally. Peppering his talk with a wealth of examples of human ingenuity at work, Radjou also shares three principles for how we can all do more with less.
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The evolution of the human eye - Joshua Harvey

The evolution of the human eye - Joshua Harvey | TEDtalks | Scoop.it
The human eye is an amazing mechanism, able to detect anywhere from a few photons to a few quadrillion, or switch focus from the screen in front of you to the distant horizon in a third of a second. How did these complex structures evolve? Joshua Harvey details the 500 million year story of the human eye.
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The benefits of a good night's sleep - Shai Marcu

The benefits of a good night's sleep - Shai Marcu | TEDtalks | Scoop.it
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.
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Αυτισμός - Τι ξέρουμε (και τι δεν ξέρουμε ακόμη)

Αυτισμός - Τι ξέρουμε (και τι δεν ξέρουμε ακόμη) | TEDtalks | Scoop.it
Σε αυτή την τεκμηριωμένη ομιλία η γενετίστρια Γουέντι Τσάνγκ μοιράζεται τι γνωρίζουμε για τη διαταραχή του φάσματος αυτισμού - για παράδειγμα ότι ο αυτισμός έχει πολλαπλές, ίσως αλληλένδετες αιτίες...
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How quantum mechanics explains global warming - Lieven Scheire

How quantum mechanics explains global warming - Lieven Scheire | TEDtalks | Scoop.it
You’ve probably heard that carbon dioxide is warming the Earth. But how exactly is it doing it? Lieven Scheire uses a rainbow, a light bulb and a bit of quantum physics to describe the science behind global warming.
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How heavy is air? - Dan Quinn

How heavy is air? - Dan Quinn | TEDtalks | Scoop.it
Too often we think of air as empty space — but compared to a vacuum, air is actually pretty heavy. So, just how heavy is it? And if it’s so heavy, why doesn’t it crush us? Dan Quinn describes the fundamentals of air pressure and explains how it affects our bodies, the weather and the universe at large.
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A virtual choir 2,000 voices strong

A virtual choir 2,000 voices strong | TEDtalks | Scoop.it
In a moving and madly viral video last year, composer Eric Whitacre led a virtual choir of singers from around the world. He talks through the creative challenges of making music powered by YouTube, and unveils the first 2 minutes of his new work, "Sleep," with a video choir of 2,052. The full piece premiered a few weeks later (yes, on YouTube!).
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Transforming Education Through the Arts

Howard Gardner probes the panelists on their own education in the arts and their experiences working in today's schools. What's unique about quality education in the arts?
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Beatboxing 101 - BEAT NYC

Beatboxing 101 - BEAT NYC | TEDtalks | Scoop.it
There’s no need for instruments to make music; you can use the greatest instrument of all, your own body.
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The chemistry of cookies - Stephanie Warren

View full lesson: http://ed.ted.com/lessons/the-chemistry-of-cookies-stephanie-warren You stick cookie dough into an oven, and magically, you get a plate of ...
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Arthur Benjamin: The magic of Fibonacci numbers | Video on TED.com

Math is logical, functional and just ... awesome. Mathemagician Arthur Benjamin explores hidden properties of that weird and wonderful set of numbers, the Fibonacci series. (And reminds you that mathematics can be inspiring, too!
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Elizabeth Loftus: The fiction of memory | Video on TED.com

Psychologist Elizabeth Loftus studies memories. More precisely, she studies false memories, when people either remember things that didn't happen or remember them differently from the way they really were.
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