THE AWARD-WINNING TEAM AT HOWSTUFFWORKS HAS DONE IT AGAIN! If you're intrigued by the world around you, you'll be fascinated with the compelling answers to 75 What If? questions. This latest book from Marshall Brain and the team at HowStuffWorks covers everything from gravity to the Great Pyramids, oxygen to exoskeletons. In Marshall Brain's signature style, you'll learn the cause and effect of such actions as swimming after eating a big meal, firing a gun at a television set, and purchasing ten shares of Microsoft stock when the company went public. You won't be able to put down this fun and captivating book! Have you ever wondered . . . What if I was struck by lightning? What if people had gills? What if an asteroid hit the earth? What if I put aluminum foil in the microwave? What if the polar ice caps melted? What if I threw a penny off the Empire State Building? About HowStuffWorks.com "50 Best Websites"-Time Magazine "A+"-Washington Post Online "Top 100 Classics"-PC Magazine "Best Science & Technology Resource"-Yahoo! InternetLife "Great Site"-MSNBCBrain, Marshall is the author of 'What If? Intriguing Answers for the Insatiably Curious', published 2002 under ISBN 9780764566578 and ISBN 0764566571.