STEM与日常科技·英语30篇（2）
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Shark Skin Surfaces and Drag Reduction in Engineering
鲨鱼皮表面与工程中的减阻设计
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Sharks swim fast because their skin has tiny tooth-like structures called denticles.
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These denticles break up water flow and reduce drag as the shark moves forward.
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Engineers copied this pattern to make swimsuits that help athletes swim faster.
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Today, similar textures coat airplane wings and ship hulls to save fuel and energy.
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This field of copying nature’s designs for human technology is called biomimicry.
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Researchers use microscopes and fluid simulations to test how well new surfaces work.
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Unlike smooth coatings, shark-inspired textures control turbulence without adding weight.
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Even wind turbine blades now use this principle to improve efficiency quietly.
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The idea seems simple, but precise scaling from shark skin to machines is challenging.
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Still, it proves that evolution solved engineering problems long before humans invented them.