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Jun 28, 2018, 12:36 pm31 pts
ENNIt turns out that to tell the sex of a Galápagos penguin, all you need is a ruler. In a paper published April 5 in the journal Endangered Species Research, scientists at the University of Washington announced that, for a Galápagos penguin, beak size is nearly a perfect indicator of whether a bird is male or…
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