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How do we smell? – Rose Eveleth

View full lesson: http://ed.ted.com/lessons/how-do-we-smell-rose-eveleth An adult human can distinguish up to 10,000 odors. You use your nose to figure out what...
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The popularity, plight and poop of penguins – Dyan deNapoli

View full lesson: http://ed.ted.com/lessons/the-popularity-plight-and-poop-of-penguins-dyan-denapoli Penguins are odd birds. For one, they cannot fly (but they are amazing swimmers), and, contrary to...
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The deadly irony of gunpowder – Eric Rosado

View full lesson: http://ed.ted.com/lessons/the-deadly-irony-of-gunpowder-eric-rosado In the mid-ninth century, Chinese chemists, hard at work on an immortality potion, instead invented gunpowder. They...
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Why does ice float in water? – George Zaidan and Charles Morton

View full lesson: http://ed.ted.com/lessons/why-does-ice-float-in-water-george-zaidan-and-charles-morton Water is a special substance for several reasons, and you may have noticed an important one right...
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The Higgs Field, explained – Don Lincoln

View full lesson: http://ed.ted.com/lessons/the-higgs-field-explained-don-lincoln One of the most significant scientific discoveries of the early 21st century is surely the Higgs boson,...
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On reading the Koran – Lesley Hazleton

View full lesson: http://ed.ted.com/lessons/on-reading-the-koran-lesley-hazleton Lesley Hazleton sat down one day to read the Koran. And what she found -- as a...
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The Arctic vs. the Antarctic – Camille Seaman

View full lesson: http://ed.ted.com/lessons/the-arctic-vs-the-antarctic-camille-seaman How can you tell the two poles apart? Where are the penguins? What about the bears? The...
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Should you trust your first impression? – Peter Mende-Siedlecki

View full lesson: http://ed.ted.com/lessons/should-you-trust-your-first-impression-peter-mende-siedlecki You can't help it; sometimes, you just get a bad feeling about someone that's hard to shake....
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Da Vinci's Vitruvian Man of math – James Earle

View full lesson: http://ed.ted.com/lessons/da-vinci-s-vitruvian-man-of-math-james-earle What's so special about Leonardo da Vinci's Vitruvian Man? With arms outstretched, the man fills the irreconcilable...
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What is an aurora? – Michael Molina

View full lesson: http://ed.ted.com/lessons/how-epic-solar-winds-make-brilliant-polar-lights-michael-molina Why do we see those stunning lights in the northern- and southernmost portions of the night...