Fascinating Facts • On the Apollo 11 mission, astronauts had only two different meals to choose from • More than six billion people live on Earth Fewer than five hundred have flown into space • The pump on the main engine of the space shuttle is so powerful that it can drain a swimming pool in twenty-five seconds Genre Nonfiction Comprehension Skill Summarize Text Features • Maps • Time Line • Captions • Sidebar Scott Foresman Social Studies ISBN 0-328-14881-4 ì