层层叠叠的地层就像是厚厚的书卷,沉积了地球亿万年来沧海桑田的历程,化石正是这部书卷中的独特文字。古生物学家的任务就是解读这些由化石所书写的地层,讲述地球的历史与故事。如何了解地球的过去?最简单的解读就是,如果在某地区发现了某种海洋生物的化石(比如某种贝壳),就可以因此而推断出该地区曾经是海洋。但是,古 Layers of layers like a thick scroll, deposited the earth hundreds of millions of years of history, the fossil is the unique text in this book. The task of paleontologists is to interpret these strata written by fossils and tell the history and story of the earth. How to understand the past of the earth? The simplest interpretation is that if a fossilized sea creature (such as a shell) is found in a certain area, it can be inferred that the area used to be the ocean. However, ancient