The National Geographic Magazine, Volume 194National Geographic Society., 1998 - Geography |
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Page 84
... birds would ruffle feathers is hardly surprising . The ancestry of birds has aroused as much passionate debate as any puzzle in evolution , except perhaps the origin of life itself and the beginnings of our own tribe . " We are obsessed ...
... birds would ruffle feathers is hardly surprising . The ancestry of birds has aroused as much passionate debate as any puzzle in evolution , except perhaps the origin of life itself and the beginnings of our own tribe . " We are obsessed ...
Page 89
... birds . Paleontologists and orni- thologists are now grappling with redefining what constitutes a bird . Caudipteryx and Protarchaeopteryx make the dividing line between dino- saurs and birds even less distinct and strengthen the theory ...
... birds . Paleontologists and orni- thologists are now grappling with redefining what constitutes a bird . Caudipteryx and Protarchaeopteryx make the dividing line between dino- saurs and birds even less distinct and strengthen the theory ...
Page 96
... bird connection . They see the similarities as convergent evolution - the development- of like traits in separate species . To them dinosaurs and birds share a common ancestor ( which has yet to be discovered ) but evolved along ...
... bird connection . They see the similarities as convergent evolution - the development- of like traits in separate species . To them dinosaurs and birds share a common ancestor ( which has yet to be discovered ) but evolved along ...
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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