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一个令人惊愕的故事1980年的一天,美国物理学会年会上诺贝尔奖金获得者阿尔弗雷兹博士向与会者讲了一个故事:距今6400万年前的一天,地球上阳光明媚,温暖潮湿的大地上到处是高大的云杉和蕨类植物,各种各样的动物正在尽情地享受着大自然的赐予.突然一阵山崩地裂般的巨响,打破了宁静与和谐.一个直径好几公里的外星体猛烈撞击在地球上,犹如几万颗原子弹同时爆炸.地球表面被撞出一个很大的坑,外星体也炸成许多碎块,一块崩到了加勒比海,一块崩到美国中部的依阿华,可能还有一些落到白令海峡附近…….阿尔弗雷兹博士认为,正是这次撞击导致了恐龙的绝灭.以后又有人提出地球曾连续两次遭到外星体的撞击,也有人认为是彗星撞击
An Amazing Story One day in 1980, at the annual meeting of the American Physical Society, Dr. Alfred, the winner of the Nobel Prize, told a story to the participants: A day ago, 64 million years ago, the earth was sunny and warm. On the wet ground, there are tall spruces and ferns everywhere. Animals of all kinds are enjoying the gifts of nature. Suddenly a burst of landslides breaks the peace and harmony. A diameter of several A kilometer of extraterrestrial bodies crashed violently on the earth, as if tens of thousands of atomic bombs exploded at the same time. The surface of the earth was knocked out of a large pit, and the extraterrestrial body was also blown into many pieces, one to the Caribbean Sea and one to the central United States. Iowa, there may be some falling near the Bering Strait.... Dr. Alfred believes that it was this impact that led to the extinction of the dinosaurs. Later, it was suggested that the Earth had been exposed to extraterrestrial bodies twice. Some people think that it is a comet impact