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What causes cavities? - Mel Rosenberg

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댓글 0건 조회 83회 작성일 16-10-17 15:02

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View full lesson: http://ed.ted.com/lessons/what-causes-cavities-mel-rosenberg<br />
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When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes. So what causes cavities, and how can we avoid them? Mel Rosenberg takes us inside our teeth to find out. <br />
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Lesson by Mel Rosenberg, animation by Andrew Foerster.

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