4. When were the bones of Ichthyornis first found?
Its bones were first found in the 1870s.
【New fossil discoveries help explain bird evolution 化石新发现有助于解释鸟类进化过程】相关文章:
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2019-11-15
2019-11-15
2019-11-15
2019-11-15
2019-11-15
2019-11-15