读了新出版的科普小册子《化石》(时墨庄著,北京人民出版社,1973年10月出版),一股清新的气息不觉迎面扑来。展现在读者面前的,是一幅变化无穷的自然界的生动画卷,请看:十多亿年前的原始海洋里,生活着各种藻类;到了四、五亿年前,形形色色的无脊椎动物——三叶虫、珊瑚、海星等等使海洋变得绚丽多彩、生气盎然,而一种最原始的鱼类便初露头角;以后,开始了水生脊椎动物向陆地的进军,而由爬行动物完成了这一过程;但是,就在恐龙显赫一时的同时,貌似弱小的、新生的哺乳动物却已经预告 Read a newly published science booklet “fossils” (Shimozhuang, Beijing people’s publishing house, published in October 1973), a fresh breath suddenly came face to face. Show to readers is a vivid picture of the ever-changing nature of nature, please see: more than a billion years ago, the original sea life with a variety of algae; to four or five billion years ago, all kinds of invertebrates - - trilobites, corals, starfish, etc. make the ocean gorgeous, vibrant, and one of the most primitive fish will emerge; later, the aquatic vertebrates began to march to the land, and reptiles completed this However, just as the dinosaurs were prominent, the seemingly weak, newborn mammal had foretold