aary 23,20( |CI|TECH [HE BATTALION 9A Thursday, January 23, 2003 vanaii inues 'our-winged dino ossils discovered ig from a m • west side p| LIAONING (AP) - Fossil unters in China have discov- red what may be one of the eirdest prehistoric species ever en — a four-winged dinosaur at apparently glided from tree tree. The 128-niillion-year-oId . . —..imal — called Microraptor the same tim*. . , f • , , • „ . lui. in honor t)t C hmese paleon- began inflatintl. . ^ ^u- u . . .^pogist Gu Zhiwei was about unit area nsil.S , t ^ u j . the calde ■ “ ' ee on ® aiK lat wo sels *”^1 feathered wings, with one set n its forelimbs and the other on s hind legs. Exactly where the creature ts into the evolution of birds hd dinosaurs is not clear. But esearchers speculated that it leveloped around the same time or even later than the first Iwo-wing, birdlike dinosaur. Four-winged dino The fossil of a 128-million-year- old dinosaur was found in China, v"'^ r7 suggest swelfe a reservoir wilt mo, researche; her’s Day flon spectacular« Kilauea. exct| ren preceded h hs of inflation.' “If it's not coil geophysical evi- :>ws the twovol- immunicating" mulations anc ring determine; bility of a coil less than one ie aid. rs said there ait is kind of tfc t |rchaeopteryx, which is dieved to have flown by actu- lly flapping its wings. Paleontologists were ntrigued by the discovery. They ave seen gliding dinosaurs icfore. but never one with feath- rs. And they have never seen a our-winged dinosaur before. It would be a total oddity MONGOLIA o Beijing CHINA Liaoning province fossil site » N KOREA S. KOpJ=A East ^ i China Sea 0 JAPAN 500 mi 500 km nt connectici oleanoes. y of thinkinj ... Mauna Lot rte and on Mai explanations fix “ the weirdest creature in the orld of dinosaurs and birds,” aid Luis Chiappe. a paleontolo- ist at the Natural History luseum of Los Angeles bounty who did not participate 1 its neighbc 1 the dig h pushed it ovr that caused tlx event,” he said ■ hypothesis is magma entered oa and actual!}, ling by Kilauei auea and ure — it sprung iffect, and the event ensued.' to tell whether . have occunee Scientists said the fossils — liscovered in the Chinese rovince of Liaoning, northeast f Beijing, at a site that has ielded several important speci- tens in recent years — revive a ebate between two theories of ow dinosaurs might have volved into birds. One theory holds that some f these apparent bird ancestors :amed to flap their wings to lower flight while they were jse equipmer: Eliding from tree to tree. The lay— include| 0th ? r . theory suggests they onitoring to f| y b Y increasing ning devices- t ^ ;ir runn ing speed with their than anythin:i in 8 s and taking off from the st, Cervelli sai;'| ri)Unt ^ I The latest find tends to sup- ion the gliding-in-trees theory. I “It’s a phenomenal find,” fhiappe said. “We don’t have lything that resembles this in ie whole dinosaur and bird ectrum.” Details of the fossils appear Thursday’s issue of the jour- Nature. Paleontologist Xing Xu of e Institute of Vertebrate laleontology and [aleoanthropology at the hinese Academy of Sciences lescribed six fossils with leg athers arranged in a pattern milarto wing feathers in mod- |m birds. “They are long and some ave asymmetrical vanes like ight feathers,” Xu said. The feathered legs amount to ar wings, Xu said. He specu- ted they could have represent- d an intermediate stage of ievelopment before the emer- >e refits) nese fields: ion, health, and Dental, itry, Student Loaf >n Jacob, . 434- SOURCE S: Nature; E SRI A P gence of true flight powered by flapping the wings. Or. the feathered legs could have been an evolutionary dead end, other researchers said. Scientists believe Microraptor gui probably did not fly by flapping its wings, because of the way the rear legs are set in the hip sockets and because the rear legs probably would have encountered turbu lence from flapping front wings. That suggests instead that both sets of wings were used just for gliding, Chiappe said. Other scientists said the fos sils add diversity to the story of flight, even if they do not imme diately provide answers. Ken Dial, head of a biologi cal flight laboratory at the University of Montana, said there is room for both gliding and flapping dinosaurs in evolu tionary hi^bry, “Gliding represents a splen did example of convergent evo lution,” Dial said. “We should not be surprised to unearth glid ing dinosaurs as we have numerous living-day examples of gliders in nearly all the verte brate groups — reptiles, mam mals, birds and even parachut ing amphibians.” Last week. Dial reported in the journal Science that the way young birds such as turkeys and quail use their wings suggests ancient birds eventually learned to fly by running and flapping. Paul Sereno, a University of Chicago paleontologist, said the best way to determine whether Microraptor gui was an inter mediate stage in bird evolution or a dead end is to find other dinosaur fossils with feathered legs. Sereno called the Xu study a landmark paper but added: “Whether this represents an intermediate form that all birds passed through is a question that’s going to be hotly debated.” ight!! 0:00 prti\ ks NEWS IN BRIEF ndian sari cloth helps clean drinking water WASHINGTON (AP) — Simply filtering water through old sari fabric ay be enough to reduce cholera cases by about half in rural vil- iges in Bangladesh, researchers say. In a study appearing this week in the Proceedings of the National cademy of Sciences, scientists filtered pond and river water rough nylon mesh and through old, much-washed sari cloth. They onduded that the sari solution worked best and could save lives in I illages where the waterborne disease annually sickens many thou- |ands of people. "Sari cloth is cheaper and we found that it is much more effective han the nylon mesh," said Rita R. Colwell, a professor of microbi- ilogy at the University of Maryland, College Park, and primary uthor of the study. 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