In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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Billions of neutrinos pass unnoticed through your body every second.
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There's a swing on the edge of a cliff in Ecuador. It has no safety measures and is called the 'Swing at the End of the World'.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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There's a café in France which charges €7 for a coffee to rude customers and €1.40 to people who talk politely to staff.
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