Rocks: the solid Earth materials: Discover the three ways rocks are formed and many of the properties of rocks and minerals -- like size, shape, color, and texture. Uses of rocks and minerals: The rocks and minerals that form within the Earth are used to make many important materials. Witness how rocks are mined, processed, and then constructed into glass, cement, bricks, houses, roads, and other objects used in our everyday lives. Earth science:...

Jeremiah is one of the many young survivors of the "Big Death" that claimed the lives of every adult in the world 15 years ago. He and his most trusted friend, Kurdy, now forge their way through a bleak wilderness fraught with danger and conspiracy, plunging into thrilling adventures that test every facet of their humanity, and ultimately the fate of the human race itself.

The Food Stamp Program and the Special Supplemental Nutrition Program for Women, Infants and Children (WIC) address poor nutrition among low-income adults, infants, and children in the United States. Higher rates of obesity among the populations these programs serve have led to concern that the programs may, ironically, contribute to the problem. To analyze the relationships between program participation and body weight, the study used cross-sectional...