Book excerpt: Larry Scheckel is an award-winning science teacher and lecturer who makes complex topics simple to understand. Here you'll find entertaining answers to 101 questions you didn't even know you had, such as, "Why does glue stick?" "Why do batteries die?" "What would happen if you put human DNA into another creature?" and "How do people record memories in their brains?" The wide-ranging questions and answers will make readers eager to learn more.