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Every day, we use materials from the earth without thinking, for free. But what if we had to pay for their true value: would it make us more careful about what we use and what we waste? Think of Pavan Sukhdev as nature's banker -- assessing the value of the Earth's assets. Eye-opening charts will m…
View full lesson: http://ed.ted.com/lessons/what-happens-when-you-get-heat-stroke-douglas-j-casaHave you ever suffered from exertional heat stroke? This condition is caused by intense activity in the heat and is one of the top three killers of athletes and soldiers in training. Douglas J. Casa expl…
View full lesson: http://ed.ted.com/lessons/how-bees-help-plants-have-sex-fernanda-s-valdovinosPlants have a hard time finding mates -- their inability to get up and move around tends to inhibit them. Luckily for plants, bees and other pollinator species (including butterflies, moths and birds) hel…
View full lesson: http://ed.ted.com/lessons/music-and-creativity-in-ancient-greece-tim-hansenYou 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. In fact, music was so impor…
View full lesson: http://ed.ted.com/lessons/mysteries-of-vernacular-lady-jessica-oreck-and-rachael-teelWhy do we call women ladies? Well, etymologically-speaking, the word comes from the Old English words for hlaf (bread) and daege (maid), which, combined, mean the female head of the household and …
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