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Dive into the history of the life-saving procedure of blood transfusions and how it has evolved since the 17th century. Uploaded 18-02-20--In 1881, doctor William Halsted rushed to help his sister Minnie, who was hemorrhaging after childbirth. He quickly inserted a needle into his arm, withdrew his…
View full lesson: http://ed.ted.com/lessons/a-trip-through-space-to-calculate-distance-heather-tunnellUploaded 06-09-13Imagine two aliens racing across outer space to their moon. Who can we deem the fastest alien? With DIRT -- or the equation Distance = Rate x Time -- we can calculate their rates, …
What if Andy Warhol had it wrong, and instead of being famous for 15 minutes, we're only anonymous for that long? In this short talk, Juan Enriquez looks at the surprisingly permanent effects of digital sharing on our personal privacy. He shares insight from the ancient Greeks to help us deal with …
What makes crystals grow into their signature shapes? Dig into the atomic patterns and unique properties of crystals.Uploaded 18-06-19--Many crystals have signature shapes— like the cascade of pointed quartz or a pile of galena cubes. Every crystal’s atoms have a defining feature: their organized, …
View full lesson: http://ed.ted.com/lessons/why-do-some-people-go-bald-sarthak-sinhaUploaded 02-10-14If you are a living, breathing human being, chances are you have felt sad at least a few times in your life. But what exactly is melancholy, and what (if anything) should we do about it? Courtney St…
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