Butterfly wings are quite thin.
³ªºñ ³¯°³´Â ¸Å¿ì ¾ã´Ù.
How do these tiny creatures cope with raindrops that land at 22 miles per hour?
ÀÌ ÀÛÀº »ý¹°Àº ½Ã¼Ó 22¸¶ÀÏ·Î ¶³¾îÁö´Â ºø¹æ¿ï¿¡ ¾î¶»°Ô ´ëóÇÒ±î?
Cornell scientists led a project that tested water drop impacts at real raindrop speeds.
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It turns out that special surface structures on butterfly wings manage the drop impacts, which scientists compared to the force of bowling balls falling from the sky on humans!
³ªºñ ³¯°³ÀÇ Æ¯¼öÇÑ Ç¥¸é ±¸Á¶´Â ³«ÇÏ Ãæ°ÝÀ» ¿ÏȽÃÅ°´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¿¬±¸ÀÚµéÀº ³ªºñ°¡ ¹Þ´Â ÈûÀº »ç¶÷ÇÑÅ× Çϴÿ¡¼ º¼¸µ°øÀÌ ¶³¾îÁö´Â ÈûÀ¸·Î ºñ±³Çß´Ù!
How do these special surfaces manage killer raindrops?
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At the level seen only with a microscope, we find the wings covered in rough bumps.
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If a drop hits flat on a sheet of glass, its force spreads in a widening wave.
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But when a raindrop hits a butterfly wing, the tiny bumps rupture that spreading force so that one big drop shatters into dozens of tiny droplets.
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Zoom in even closer to nanoscopic levels and we find wax structures that make the wings water-resistant.
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The droplets bounce right off.
µû¶ó¼ ¹°¹æ¿ïÀº ¹Ù·Î Æ¢°ÜÁ® ³ª°¬´Ù.
Without them, water would stay on the wings longer, and that would wick too much heat from tiny insect bodies.
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