A skeleton of the alvarezsauroid Alnashetri cerropoliciensis—representing a highly complete alvarezsauroid skeleton from South America—provides evidence on the evolution of the peculiar anatomy and miniaturization within this unusual theropod dinosaur clade.
Another example: why do so many languages implicitly view the right hand as good (for instance, associating the direction right with the ethical concept of rightness) and the left hand as bad, maladroit, sinister?
。业内人士推荐91视频作为进阶阅读
定方向：求「下一个」→ 倒序；求「上一个」→ 正序。
The crew of the ill-fated Apollo 13: Jack Swigert, Jim Lovell and Fred Haise