Informative and intriguing, this science book teaches children to think about the complex and interdependent web of life on Earth. Every link in a food chain is important because each living thing depends on others for survival, no matter how big or how s
May 18, 1980, 8:32 A.M.: An earthquake suddenly triggered an avalanche on Mount St. Helens, a volcano in southern Washington State. Minutes later, Mount St. Helens blew the top off its peak and exploded into the most devastating volcanic eruption in U.S.