单词:prebasic molt
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Cicadas Swarm Wide Portions of US The cicadas are back. Over the past few weeks, across a wide swath of the eastern United States, the notoriously noisy bugs have emerged by the billions from their long, underground adolescence. On a muggy afternoon
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This is Scientific American's 60-second Science. I'm Karen Hopkin. This will just take a minute. If you were a bird, how big could you be? Well, an ostrich can weigh 400 poundsbut it cant get off the ground. So what if you want to fly? University of
Kenyan President Mwai Kibaki is considering whether to sign a price control bill into law that would allow the government to set prices on basic items such as maize, wheat, cooking oil and petrol. Kenya's parliament approved the measure in June. Supp
Molting Molds Flying Bird Size Limit A study in the journal Public Library of Science Biology finds that it's the rate at which flying birds can replace their flight feathers that determines how big they can grow and still get off the ground. Karen
Captain Nemo walked in front, and his companion followed us a few steps to the rear. Conseil and I stayed next to each other, as if daydreaming that through our metal carapaces, a little polite conversation might still be possible! Already I no longe