论大气环境的变化是导致恐龙灭绝原因的新假说

发生在6500万年前的生物大灭绝一直是引起人们深入思考的一次事件,解释这次大灭绝事件的原因已有80多种,虽然各种解释都有其合理性,但认真研究起来都不能完全令人信服。从地球生命发展的总进程来看,地球大气中在不同时期氧气含量的变化与臭氧层的变迁应该是影响地球生物的重要因素,当时大气环境的变化才是这次地球生物大灭绝的根本性原因。

A New Hypothesis of the Extinction of Dinosaurs because of the Changes of Atmospheric Environment

The great biological extinction 65,000,000 years ago has been causing people＇s consideration.There are more than 80 explanations of the reasons for this extinction.Although every explanation sounds reasonable,none of them is completely convincing after careful studies.According to the general course of the life development on the Earth,it can be concluded that the changes of the amount of oxygen in the atmosphere and the changes of the ozonosphere are the main reasons for affecting the living organisms on the Earth.Thus,this paper tries to point out that the changes of the atmospheric environment are the basic reasons for the great biological extinction.