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Flight attendants struggle every time they close the aircraft door—why not design it as an electric
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China's largest security agency, more mysterious than the NSA and FBI, reveals China's real anti-esp
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Interesting scientific phenomenon: colored drops on glass will "automatically classify", do you know
When I break the ampoule open, will it break accidentally? What should I do if the fragments fall in
The incredible ball-splitting paradox! How can a piece of chocolate be eaten infinitely? What's the
The incredible "gallium needle" can make the skin soft after injection. What is the principle behind
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