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MUFONET-BBS NETWORK - MUTUAL UFO NETWORK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ARCHAEOLOGY NEWS - WIRE ~~~~~~~~~~~~~~~~~~~~~~~~~ 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 =START= XMT: 13:01 Tue Oct 22 EXP: 13:00 Tue Oct 29 쿙EW STUDY CASTS DOUBTS ON DOOMSDAY SCENARIO OF ASTEROID 쿥IPING OUT DINOSAURS 쿞AN DIEGO (OCT. 22) UPI - The era of the dinosaurs was 쿭rawing to a close and would have ended with the natural 쿮xtinction of the great lizards whether or not a giant 쿪steroid had slammed into the earth, a study released Monday 퀂howed. 쿟he study, unveiled at the annual meeting of the Geological 쿞ociety of America cast doubts on the doomsday scenario of a 쿴uge object from outer space crashing into earth 66 million 퀉ears ago, kicking up a huge cloud of dust that blotted out 퀃he sun for weeks and killed off the cold-blooded reptiles 퀇hile hardier mammals survived. ''No data supporting the impact theory of dinosaur 쿮xtinction exists, '' said David Archibald, a biology 쿾rofessor from San Diego State University who helped devise 퀃he ''Blackjack Model'' of prehistoric survival. The model 퀂hows that luck and ''evolutionary skill'' was responsible 쿯or the survival of species following the dinosaur-dominated 쿎retaceous Period. 쿌rchibald and his colleagues _ Peter Dodson of the 쿢niversity of Pennsylvania and Robert M. Sullivan of the San 쿏iego Natural History Museum _ have decided that the 16 to 20 dinosaur species left when the theoretical asteroid hit 퀃he earth at the end of the Cretaceous Period were already 쿭ying out because of a lack of gentetic diversity and the 쿹oss of habitat caused by changes in the earth's land 쿯ormations. ''The impact theory predicted a mass extinction killing up 퀃o 75 percent of all species,'' Archibald said. ''Instead of 75 percent extinction, upwards of 65 percent of the 퀆ertebrae species survived the end of the Age of 쿏inosaurs.'' 쿟he study was based on more than 150,000 fossils of 111 퀂pecies of dinosaurs, mammals, fishes and various reptiles. 쿟he scientists said that 93 percent of the dinosaur species 퀃hat had exsisted since the beginning of time had already 쿭ied out by the time the asteroid collision would have 쿽ccured. 쿝ather than the overnight elimination of the dinosaur, 쿯ossil records from the period known to scientists as the K- 쿟 Boundary, reflect what the researchers believe was the 쿻atural end of the dinosaur line. ''What we are seeing is just the extinction of this 7 쿾ercent,'' Sullivan said. ''Animals evolve and animals 쿫ecome extinct.'' 쿘any dinosaur lines evolved into modern birds while others 퀂imply ended at various times in history. ''Until people understand the strong bird-dinosaur 퀁elationship, we will continue to discuss their 쿮xtinction,'' Sullivan said. =END=


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