Discoveries Attract World's Attention
The American magazine Discover has chosen
100 pieces of science news in the world for the year 2004. Two Palaeontological
discoveries in China-the first pterosaur egg and embryo fossils in the
world and the most ancient bilaterian animal -are on the list.
Lacking evidence about whether Pterosaurs
were oviparous or not, arguments in the academic world have been going
on for hundreds of years. On June 10, 2004, a paper was carried in the
magazine Nature, about the Pterosaur embryos in early Cretaceous Period
(about 121 million years ago) discovered in Rehe biocommunity, Liaoxi,
China, published by Wang Xiaolin and Zhou Zonghe, research fellows in
paleontology from the Institute of Vertebrate Paleontology and Palaeonthropology,
CAS. This important new discovery has proved beyond doubt that Pterosaurs
were oviparous, not viviparous, like other reptiles and birds.
Chen Junyan, research fellow of the Institute
of Geology and Paleontology, CAS and other Chinese and American Paleontologists
published a paper in the magazine Science in July 2004, describing their
findings: the most ancient bilaterian animals. The animal's fossil (about
600 million years back), named Vernanimalcula guizhouena, only 0.2 millimeter
long, has preserved symmetrical structure on both sides like a pair of
coeloms and paired sense pits.
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