Acid rain is considered by many people to be one of the most serious environmental problems of our time. It is a global problem that is gradually affecting our world. The term acid rain was coined b …

Even though we can't feel it, air is constantly pressing down on us with a tremendous force -- 14.7 lbs. per square inch (100,000 newtons per square meters), to be exact! This was graphically demon …

Antarctica is a six million square-mile area locked in an ice age. Its waters team with more life than a tropical rain forest, and its coast plays host to some of the most magnificent animals in the …

Exploration of new or rarely-explored frontiers often requires remarkable courage, determination, and endurance. These characteristics, as well as others, were needed by the early explorers of the co …

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Folklore is rich with explanations for the stunning night-sky lights, the aurora borealis. Various cultures have explained them as dancing spirits or blood raining from the clouds. Aurora was the Ro …

Suppose you go outside and throw an apple straight up into the air. The Earth's gravity slows the upward speed of the apple until it finally stops--and then starts falling back down. But suppose you c …

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