reader Mark S,
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. wondered if the inability to fly conveyed any advantages to the cormorants.
It appears so, says evolutionary biologist Alejandro Burga of UCLA. The Gal&aacuteagos cormorant may be flightless, but it’s a great diver. “Shorter wings can be advantageous for diving because they decrease bouyancy by decreasing the number of air bubbles trapped in feathers,” Burga wrote in an e-mail. Because the birds are flightless,
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, they can allocate the energy they would use flying for other purposes. “In fact,
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, the Gal&aacuteagos cormorant is larger and heavier than its close relatives. This confers an advantage,
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,” he wrote. With increased oxygen storage they can dive for longer.
Butterfly engineering
Scientists re-created a nanostructure found on green hairstreak butterfly wings,
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,?Emily Conover reported in “Sorting out a butterfly’s bright color, with a twist” (SN: 6/11/16, p. 32). The bioinspired structure can separate polarized light and may be useful for telecommunications,
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Settler Surprise


Stone tools discovered in Florida provide evidence that hunter-gatherers inhabited the region at least 1,
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,000 years before the Clovis, once thought to be North America’s earliest settlers,
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,?Bruce Bower reported in “Florida inhabited surprisingly

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