Elementary

Explores the people, ideas, and inventions behind the major scientific breakthroughs in astronomy, physics, anatomy, and mathematics. Examines scientific greats including Galileo, Kepler, and Brunelleschi, and discusses how the life of a scientist often conflicted with existing religious beliefs. DVD divided into chapters. Includes discussion questions and Spanish soundtrack option.

Despite its wonders, Earth's water cycle does not spread water evenly around the planet. The Ogallala Aquifer’s huge underground reservoir of water gives the relatively dry Central Plains states such as Nebraska a large but limited irrigation source. But the aquifer's water is being used up faster than it is beng replenished.