Millions of years ago dinosaurs ruled the Earth, but they died out long before people existed. We only know about dinosaurs from their fossils - animal and plant remains that have been preserved in rocks, and which we can still see today.
兰台网图书档案馆全面收录古今中外各种图书,详细介绍图书的基本信息及目录、摘要等图书资料。