A bigger mass extinction, at the end of the Permian period 251m years ago, killed 70% of the world's land vertebrates (and 96% of all Marine animals) and paved the way for the age of reptiles.
而更大规模的灭绝发生在25100万年前二叠纪末期，致使世界上70%的陆地脊椎动物(和96%的海洋动物)死亡，同时造就了爬行动物的时代。
Scientists show that fishes and reptiles existed before the age of man.
科学家证明鱼类和爬行类在人类纪之前就已存在。
Scientists show that fishes and reptiles existed before the age of man.
科学家证明鱼类和爬行类在人类纪之前就已存在。
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