这具精致而又几乎完整的遗骸化石的曝光归功于美国眼科医生亨利·克里斯坦(Henry Kriegstein)，当时他打电话给研究人员说，他从一个商人手中买下了这具化石。
The exquisite and almost complete remains only came to light when an American eye surgeon, Henry Kriegstein, telephoned the researchers to say he had bought the fossil from a trader.
但是之后，如果有新的化石或是新的证据被发现，结论就会被确证或否证，正是这种方式使得更精致的理论得以浮现。
But then, when a new fossil or other new evidence is discovered, the conclusion is confirmed or disproved, in which case refined theories emerge.
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