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Made a glider with balsa wood strips and film, and the weight is only 0.42 grams? !

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The wisdom of the working people is to change the direction of force to move heavy objects. #Science

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Why does the bearing emit "hot air" when installing it? This is the interference fit installation me

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Why has the alligator gar survived for hundreds of millions of years? #Science #FantasticBeasts #All

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Why can loose sand be made into sand sculptures after mixing with water?

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