How are you feeling?Most of the time you feel fine, but sometimes you get sick. Sometimes a germ catches up with you.Germs are all around you, but they are too small for you to see. Many germs are harmless, but two kinds, viruses and bacteria, can make yo
Ka-choo! Brrr. Yawnnnn.Have you ever wondered what makes you sneeze when you're in a dusty room? Or shiver when you get out of the bathtub? Or yawn when you're tired? All of these actions are reflexes. Your body makes them happen even though you don't tel
An oil spill occurs somewhere in the world almost every day of the year. This book focuses on one of the worst spills in history--the Exxon Valdez oil tanker spill--to explain in simple terms and with bold, full-color illustrations why oil spills happen,
