Why is spider silk stronger than steel? Why isn't it more widely used?

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A Certain Scientific Railgun

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Bikini Bottom really exists in the world! Where is Bikini Beach? How are tropical coral reefs formed

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How much silk can a spider produce?

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Ariel: Be gentle, Xiaobai, everything is under control

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[Movie&TV] Horror Movie Clip: No Eye Contact with the Princess

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How good is Ouyang Nana’s cello skills?

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What kind of creature is this? It's so strange!

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Film|Scary Scene in "Nobody Sleeps in the Woods Tonight"

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[Movie] 'Resident Evil 0' Bat Boss Fighting Scene

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