You'll have to find out in this book. Click here to see my book review of the Magic Tree House series and a photo of me with Mary Pope Osborne. My brother Zachary has his own book review page now, for younger kids. Did You Know has the answers to many of your questions. It has special sections.
Every section has different stuff.
There's the natural world, conservation, the human body, science and technology and sports, and there's an index. There are 344 pages in the whole book. You may know some of these, like whether apes are intelligent , why birds enter crocodiles' jaws , what's the driest place in the world , and more. But there are also lot of things that you probably didn't know, such as where you find hammers, anvils and stirrups , and what an eclipse is . Where the Olympic Games began you may know, but you may not know what the America's Cup is, and what a Plimsoll line is.