Gray, or Grey, any color formed by blending black and white. Gray tones range from nearly white to nearly black. The many tiny dots of black and white in a halftone reproduction of a photograph produce gray tones.
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?
Most of us have heard the talk about oysters and chocolate, and maybe you've read an article about the stimulating effects of ginseng. But garlic, licorice and cucumber? Learn about the history of aphrodisiacs and whether they've been proven to be effective.