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How luna moths grow extravagant wings

For the first time, biologists have linked the ribbony “tails” streaming from big, green luna moths’ hind wings with, of all things, a cozy climate. Those dangling wing tails rank among such evolution-was-drunk novelties as the narwhal’s single unicorn tusk or the peacock’s giant feather train. Wing streamers with twisting or cupped ends have evolved…

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