In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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In Brazil, prison inmates can reduce their sentence by 4 days (up to 48 days a year) for every book they read and write a report on.
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Mathway.com solves all kinds of math homework problems with step by step explanations.
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