长话短说,山许靖华教授在他所写的这本书中展开的争论如下:铱异常,锇同位素比,冲击石英颗粒和烟熏微粒在白垩系——第三系交界处粘土中的富集,证明是一巨大的地外体撞击地球并导致陆上和海内的生物大量灭绝。对这些灭绝有一生态和时间上的格局,核冬天不能完全解释这一事件。有些生物死于热浪,一些意外死于随后到来的黑暗和严冬,还有些由于酸雨、环境污染或由于臭氧层的耗尽引起的紫外线辐射致死。因此物种的灭绝是外来动 To make a long story short, Professor Hsu Hsuan-Hua’s argument in his book is as follows: Anomalies of iridium, osmium isotopes, enrichment of quartz particles and smoky particles impacted in the Cretaceous-Tertiary junctions prove that Is a huge extraterrestrial impact on the Earth and a massive extinction of both onshore and offshore creatures. There is an ecological and temporal pattern of these extinctions, and nuclear winter can not fully explain the incident. Some creatures die of heatwaves, some accidentally die of darkness and winter, and others die of ultraviolet radiation due to acid rain, environmental pollution, or depletion of the ozone layer. Therefore, the extinction of species is external