The forecast itself becomes more interesting and more understandable if we look into the meanings of the terms that forecasters use. Some parts of the weather forecast seem easy enough to understand—for example, the predicted high and low temperatures. But weather terms such as "high-pressure system," "occluded front," or "temperature-humidity index" sound more complicated. The meanings of these terms become clear, however, once you know something about the major factors that produce the weather and how these factors influence one another.
About 90 percent of Americans consume some form of caffeine every day: It's our most popular drug by far. What's so special about this stimulant?
Marijuana isn't just a recreational drug for hippies and philosophy majors -- its psychoactive history ranges from Egyptian mummies to modern U.S. politics. What's the big deal about this leafy, green plant?