For the past 13 years, the folks at The Why Files, an online magazine based here in Madison, have been answering questions about science in a way that regular folks can understand and even enjoy. On April 28, The Why Files makes the leap to the printed page with a new book from Penguin. In a recent chat with David J. Tenenbaum, who with Terry Devitt wrote the book, I got the chance to ask some questions of my own. Namely, why the heck would a writer from an award-winning science website (whyfiles.org) branch out into something as old-fashioned as a book?