未成年比目鱼(flatfish)的眼睛对称地长在头部两侧,但在成年过程中,其中一只眼睛会在头骨周围移动,直到跟另一边的眼睛接近时才停止活动。达尔文和一些进化生物学家认为比目鱼的这一特征是经过很多代的进化逐渐形成的,但这就需要证明进化过程中曾经存活过处于中间阶段的眼睛部分偏移的比目鱼,只不过这样的化石一直没有发现。然而,近日美国芝加哥的一位博士找到了这种过渡形式的化石证据,揭开了这一进化谜团。 The eyes of the flatfish are symmetrically on either side of the head, but during adulthood, one of the eyes moves around the skull until it is close to the other eye. Darwin and some evolutionary biologists believe that the characteristics of the flounder evolved through many generations of evolution, but it is necessary to prove that in the evolutionary process once lived in the intermediate stage of the eye part of the flounder, but such fossils Has not been found. However, a Ph.D. student in Chicago, USA, recently found fossil evidence of this transitional form and uncovered this evolutionary mystery.