The National Geographic Magazine, Volume 194National Geographic Society., 1998 - Geography |
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Page 84
... wings , light bones , and airy , flexible feathers . A N 18TH - CENTURY SAGE once proposed that birds arose from fish cast upon the land : " Fins turned to quills , the dried scales became feathers , the skin assumed a coating of down ...
... wings , light bones , and airy , flexible feathers . A N 18TH - CENTURY SAGE once proposed that birds arose from fish cast upon the land : " Fins turned to quills , the dried scales became feathers , the skin assumed a coating of down ...
Page 91
... wings to slice the air , permitting at least rudimentary flight . Eoalulavis Found in Spain , this bird exhibits the earliest known alula , a tuft of feathers attached to the thumb . By altering airflow , the alula permits good ...
... wings to slice the air , permitting at least rudimentary flight . Eoalulavis Found in Spain , this bird exhibits the earliest known alula , a tuft of feathers attached to the thumb . By altering airflow , the alula permits good ...
Page 98
... wing high above its back . Goslow and Poore's study of Archae- opteryx shows that it lacked the shoulder structure necessary for rapid wing upstroke . If the archaic bird did flap its wings to remain air- borne , it did so by some as ...
... wing high above its back . Goslow and Poore's study of Archae- opteryx shows that it lacked the shoulder structure necessary for rapid wing upstroke . If the archaic bird did flap its wings to remain air- borne , it did so by some as ...
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adverse events afarensis africanus American Archaeopteryx Asst AUGUST birds bones bottlenose BOTTLENOSE WHALES called camera Canada Caudipteryx cetirizine CHIEN-CHI CHANG China Chinatown Chinese Chrysler 300M clinical trials creature Danes Danish Denmark diabetes dinosaurs Director disaster dogs dose drug Earth erectile dysfunction explore feathers feet female fire flood fossil frogfish human hurricanes images Inca Indonesia insulin island John JULY kids land lander light live look male Mars Mars Pathfinder Martian Mexico mg/kg miles million months NATIONAL GEOGRAPHIC SOCIETY NATURAL HAZARDS Nissan Nissan Pathfinder North orangutans Pathfinder patients pediatric PHOTOGRAPHS placebo Prize Protarchaeopteryx rain forest rats Rezulin rocks rover says scientists Sihetun sildenafil Sinosauropteryx species studies telescope there's theropods tion Titanic tornado town tree trip troglitazone VIAGRA whales wild wings winner YUKON RIVER ZYRTEC