恐龙,生活在中生代,是曾主宰过地球的庞然大物。为什么在6500万年前的白垩纪末期突然灭绝而退出历史舞台?是谁杀害了恐龙?科学家们进行了长时间的研究,提出了各种各样的见解,试图解开恐龙灭绝之谜。真是众说纷纭,莫衷一是。 灾变事件说 ●小行星撞击说 美国航空航天局下属的喷气推进实验室的科学家们提出该说。他们认为,6500万 The dinosaurs, who lived in the Mesozoic, were the behemoths that once dominated the earth. Why did you suddenly die out at the end of the Cretaceous period 65 million years ago and left the stage of history? Who killed dinosaurs? Scientists have conducted long-term research and put forward various opinions to try to solve the mysteries of extinction of dinosaurs. There is a lot of difference and no consensus. Cataclysm Incidents ● Asteroid hits The scientists at the Jet Propulsion Laboratory under NASA proposed this. They think that 65 million