小化石可能是最早的多细胞动物
大约5亿4千万年前，地球上的生命经历了意义深远的膨胀------寒武纪大爆发。在大爆发里，地球上的多细胞生命快速多样化。
SCIENCE杂志报导，，，在中国的石头里发现了这一革命（多细胞生命快速多样化）的起始。化石里是最早的左右对称生物， 大约寒武纪大爆发前5千5百万年。化石里有嘴，咽，体腔，感觉器（可能）， 三胚层结构
陈均远等发现了10个化石，在中国西南的都山头（音译）地层，此地层5.80 到6.00亿年的年龄。，，，，，，，，，，，，，，，
这英语太简单，就不翻了
Science. 2004 Jun 3 [Epub ahead of print] Related Articles, Links
Small Bilaterian Fossils from 40 to 55 Million Years Before the Cambrian.
Chen JY, Bottjer DJ, Oliveri P, Dornbos SQ, Gao F, Ruffins S, Chi H, Li CW, Davidson EH.
Nanjing Institute of Geology and Paleontology, Nanjing 210008, China; Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing 210093, China.
Ten phosphatized specimens of a small (<180 micro m) animal displaying clear bilaterian features have been recovered from the Doushantuo Formation, China, 40 to 55 million years before the Cambrian. Seen in sections, this animal (Vernanimalcula guizhouena gen. et sp. nov.) had paired coeloms extending the length of the gut; paired external pits that could be sense organs; bilateral, anterior-posterior organization; a ventrally directed anterior mouth with thick walled pharynx; and a triploblastic structure. The structural complexity is that of an adult rather than larval form. These fossils provide the first evidence confirming the phylogenetic inference that Bilateria arose well before the Cambrian.
