Scientific American Magazine

It has been clearly demonstrated that fluoridation tends to prevent tooth decay and does no harm. Then why are many people violently against it? How the question was investigated in Northampton, Mass.

The connection between these solar particles and terrestrial effects such as magnetic storms and the aurora has long been known. But what is the mechanism that accounts for these effects in detail?

The cloud chamber traces the path of a subatomic particle with droplets in a vapor. The new bubble chamber does the same with bubbles in a liquid. Therein lie certain advantages to physicists

Not to be confused with the Yerkes Observatory of astronomy, they are dedicated to primate biology. Within their sunny Florida confines workers of many disciplines study the chimpanzee, and vice versa

In which Smith plays a game with Jones and Columbus plays a game with nature to illustrate how this comparatively new mathematical tool can be used to grapple with problems involving uncertainties

The rigid framework of the body is a remarkably active and versatile tissue. Of current physiological interest is its dual function in maintaining the level of calcium in the blood

Audrey (which stands for Automatic Digit Recognizer) can "hear" 10 numbers and 16 of the 40 basic sounds in English, but has a little trouble with those spoken by people other than one of her designers

Most plants stay in one place, but their parts twist, bend, open or close. And one kind of plant can move 99 times its own length in a second, which for a man would work out to 400 miles per hour