When will Niagara Falls disappear? Can any bird fly upside down? What is a nuclear meltdown? Is white gold really gold? Do bears in zoos hibernate? How do fireflies produce light? You'll find answers to 1,400 frequently asked, but hard to explain questions like these inside. This updated edition of the bestselling "Handy Science Answer Book" tackles dozens of new sci-tech topics, as well as your old favorites - from the inner workings of the human body to outer space, and from mathematics and computers to cars, boats, planes and trains. The clear-cut, straightforward style of "The Handy Science Answer Book" makes answers fun and easy to understand. With more than 100 illustrations and dozens of tables and graphs, it's a friendly resource for browsers, scanners and serious sojourners in the realms of science and technology. - from Amzon