恐龙在地球上生存的时间是？恐龙的骨头是如何组合在一起的？化石是什么，它们是如何让我们了解史前世界的？“你知道吗？”系列对大量的流行主题进行了深入的研究。每本发人深省的书都能吸引那些想了解一切的孩子，其特点包括：

- 96页的篇幅中充满了增长见闻的内容和对许多流行问题的回答
- 数百张带标签的插图
- 一份关键术语索引
- 还有一个 "更多信息 "部分，激励儿童进一步探索

When did dinosaurs roam the earth? How are dinosaur bones put together? What are fossils, and how do they teach us about the prehistoric world? The Do You Know?™ books provide an in-

depth look at a wide range of popular subjects. Appealing to children who want to know everything, each thought-provoking book features

• 96 pages filled with informative content and answers to many popular questions
• Hundreds of labeled illustrations
• An index to key terms
• And a "More to Know" section that motivates children to explore further