论文部分内容阅读
近年来,人们取得了一系列地外灾变事件的证据,特别是铱异常和微球粒的发观,被人们认为是天体撞击地球的直接证据。本文仅对微球粒作些粗浅讨论。
In recent years, evidence has been obtained of a series of extraterrestrial catastrophic events, in particular the anomalies of iridium and the appearance of microspheres, which are thought to be direct evidence that celestial bodies hit the Earth. This article only for the microsphere to make some superficial discussion.