Introduction Did you know that playground swings can provide a good lesson in physics—as well as lots of fun? The back-and-forth motion of a swing is an example of a pendulum. We see pendulums in ...

Charles Sanders Peirce, a practicing scientist and proponent of philosophical pragmatism, began the gravity program of the U.S. Coast and Geodetic Survey in the early 1870s, at a time when his father ...

Scientific American is the authority on science and technology for a general audience, with coverage that explains how research changes our understanding of the world and shapes our lives. First ...

The "Edward Kübel, Washington" inscription suggests that this pendulum was made between 1875, when Kübel began in business, and his death in 1896. The form is similar to that designed by the English ...