Despite its wonders, Earth's water cycle does not spread water evenly around the planet. The Ogallala AquiferÂ’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.
Compares the computer with the abacus, traces the invention of computers throughout the decades, identifies the main parts of the computer, meets the creator of the mouse, and speculates about the future uses of computers.
