澳大利亚科学家发现了1.05亿年前的鸟祖先化石. Australian scientists find 105-million-year-old platypus ancestor fossil.

澳大利亚古生物学家在维多利亚发现了一块1亿5千万年前的化石骨头,据信是鸟或鱼的古代单体动物祖先. Australian paleontologists discovered a 105-million-year-old fossil bone in Victoria, believed to be from an ancient monotreme ancestor to the platypus or echidna. 最近使用中子放射学分析显示, 骨的内部结构类似于白虎动物的内体结构, 这表明该生物是水生物. Recent analysis using neutron radiography showed the bone’s internal structure resembles that of a platypus, suggesting the creature was aquatic. 这支持单体动物从一个共同的,适应水源的祖先进化而来. This supports the theory that monotremes evolved from a common, water-adapted ancestor.