Henry Carter Hull

A collection of twenty-two activities that describes the solar system and how it has been explored by using telescopes, satellites, landers, and human missions.

The Stargate is an intergalactic gateway, developed by an ancient civilization, that links other planets in other solar systems to ours. When hostile aliens attempt to invade earth through the Stargate, the U. S. Air Force assembles an elite team to carry-out peacekeeping missions.

The following is excerpted from the issue guide, America's Energy Future: How Can We Take Charge? Americans depend on easy access to energy. Most of us take it for granted that we will be able to light up a room with the flick of a switch, adjust the temperature of our homes at will, and climb into our cars every morning to go to work, often at distant sites. We use more energy than any other country. Americans make up only 4.5 percent of the world's...