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Earth's Original Aviators (U.S. National Park Service)
BRPROUD Science: Why do some birds fly in V formation?
Those birds that crashed and died? It wasn't fumes. – Harvard Gazette
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Answering an Age-Old Mystery: How Do Birds Actually Fly? - Scientific American
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Engineers identify key to albatross' marathon flight, MIT News
Why Birds Fly in a V Formation, Science
BIRDS IN FLIGHT