More than 99% of birds can fly. But that still leaves many species that evolved to be flightless, including penguins, ostriches, and kiwi birds. In a new study in the journal Evolution, researchers ...
Filoplumes may be tiny, but these hairlike feathers enable nonstop flights that span thousands of miles. Filoplumes may be tiny, but these hairlike feathers enable nonstop flights that span thousands ...
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