Top 50 Questions Wild Earth Author:Seymour Simon What comes out of a volcano? How fast do tsunamis move? What causes a mudslide? Acclaimed author Seymour Simon answers these questions and many more about our planet. You'll learn about avalanches, earthquakes, volcanic bombs, tsunami waves and more! With incredible photos and fascinating facts, this is the perfect answer to all your questi... more »ons about our wild and wonderful earth.« less