An incredible scientific phenomenon: two circles have different diameters, but why do they roll the

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Why is there a big ball on the roof? It works without oil or electricity. Do you know how it works?

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What is a "Koch snowflake"? Why does it have a finite area but an infinite circumference?

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What is "porcelain mending"? Put a copper nail in the crack and hit it, and an interesting phenomeno

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The incredible metal "gallium" will break when it is coated on a Coke can. Do you know the reason?

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The incredible "artificial stone splitting method" uses a hammer to hit the steel nail, and an inter

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The incredible "heat-insulating tiles" can be baked at 1200 degrees and then held directly by hand.

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Why does a compound bow get easier to draw the more you draw? Its design defies physics, allowing yo

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The secret of the square wheel's forward motion: the catenary, which mathematicians have studied for

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The incredible "Chinese Magic Mirror" shines a flashlight on the mirror surface and interesting phen

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