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The interesting metal "Bismuth" has an oxide film that can never be scraped off! Why is it still col

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The incredible "sedimentation phenomenon" makes sewage clear in seconds after being scooped out! Wha

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In ancient times, there were no refrigerators. How did people make and preserve ice in the summer? Y

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An interesting scientific phenomenon: putting a wooden spoon on the pot can prevent it from overflow

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This incredible "old candle" has been burning for 40 years! How did it first form?

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Why do cold water and hot water mix and become incompatible? Do you know the principle?

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Mercury, the natural nemesis of gold, when mercury is dropped onto gold foil, an interesting phenome

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[Food Record] How did Britain become the king of dark cuisine?

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