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In the United States, an estimated 30 percent of adults and 66 percent of teens don't get enough sleep on a regular basis. But that's no small problem, because staying awake can cause serious damage to the body. Claudia Aguirre shows what happens to the body and brain when we don't get enough sleep. Lesson by Claudia Aguirre, animation by Lisa LaBracio. Watch the full lesson at: https://ed.ted.com/lessons/what-would-happen-to-you-and-get-something-to-do.