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What Causes Hallucinations? – Elizabeth Cox (Transcript)

TED-Ed Video Lesson:  An elderly woman named Rosalie was sitting in her nursing home when her room suddenly burst to life with twirling fabrics. Through the elaborate drapings, she could make out animals, children, and costumed characters. Rosalie was alarmed, not by the intrusion, but because she knew this entourage was an extremely detailed hallucination. …

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What Causes Insomnia? by Dan Kwartler (Transcript)

TED-Ed Lesson:  What keeps you up at night? Pondering deep questions? Excitement about a big trip? Or is it stress about unfinished work, an upcoming test, or a dreaded family gathering? For many people, this stress is temporary, as its cause is quickly resolved. But what if the very thing keeping you awake was stress …

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