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Saturday, May 17, 2008 |
Saturday, May 17, 2008 |
Photo: Largest Flying Bird Could Barely Get off Ground, Fossils ShowA new fossil study shows that the bird was too big to fly by flapping its wings and instead likely took to the skies by harnessing the power of warm-air upcurrents called thermals. Graphic by Katie Parker, National Geographic Digital Media
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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