科学家表示找到了海豹和海象早期进化过程中“缺失的一环”——一种长有脚蹼、类似水獭的动物的骨骼化石,它提供了早期鳍足类动物从陆地向海洋进化过程中身体特征的直接证据。填补化石记录重要空白这些脚部骨骼化石和其他身体 Scientists say they found the seal and the walrus “a missing link” in the early evolution - a fossilized fossilized otter-like animal that provides the fossilized fossil of the primitive finfoot from land to sea Direct evidence of physical characteristics. Fill fossil record important blank these foot bones fossils and other bodies